/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_7.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 23:32:14,191 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 23:32:14,194 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 23:32:14,235 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 23:32:14,235 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 23:32:14,248 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 23:32:14,249 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 23:32:14,252 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 23:32:14,255 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 23:32:14,258 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 23:32:14,259 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 23:32:14,263 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 23:32:14,264 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 23:32:14,265 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 23:32:14,266 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 23:32:14,267 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 23:32:14,267 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 23:32:14,269 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 23:32:14,270 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 23:32:14,275 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 23:32:14,278 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 23:32:14,279 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 23:32:14,280 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 23:32:14,281 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 23:32:14,286 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 23:32:14,300 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 23:32:14,301 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 23:32:14,303 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 23:32:14,304 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 23:32:14,352 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 23:32:14,352 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 23:32:14,354 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 23:32:14,355 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 23:32:14,355 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 23:32:14,355 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 23:32:14,355 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 23:32:14,356 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 23:32:14,356 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 23:32:14,356 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 23:32:14,357 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 23:32:14,357 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 23:32:14,358 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 23:32:14,358 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 23:32:14,358 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 23:32:14,358 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 23:32:14,359 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 23:32:14,359 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 23:32:14,359 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 23:32:14,359 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 23:32:14,359 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 23:32:14,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 23:32:14,360 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 23:32:14,360 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 23:32:14,360 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 23:32:14,360 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 23:32:14,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 23:32:14,361 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 23:32:14,361 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 23:32:14,361 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; [2020-08-18 23:32:14,694 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 23:32:14,712 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 23:32:14,716 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 23:32:14,718 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 23:32:14,719 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 23:32:14,720 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_7.c [2020-08-18 23:32:14,795 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ee7baf305/97387420ff1d4c1a9b669ce6bc8e5dc8/FLAGa7103e3f2 [2020-08-18 23:32:15,209 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 23:32:15,210 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_7.c [2020-08-18 23:32:15,221 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ee7baf305/97387420ff1d4c1a9b669ce6bc8e5dc8/FLAGa7103e3f2 [2020-08-18 23:32:15,575 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ee7baf305/97387420ff1d4c1a9b669ce6bc8e5dc8 [2020-08-18 23:32:15,585 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 23:32:15,587 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 23:32:15,589 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 23:32:15,590 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 23:32:15,593 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 23:32:15,594 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:32:15" (1/1) ... [2020-08-18 23:32:15,598 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30829a49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:15, skipping insertion in model container [2020-08-18 23:32:15,598 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:32:15" (1/1) ... [2020-08-18 23:32:15,606 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 23:32:15,627 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 23:32:15,813 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 23:32:15,824 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 23:32:15,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 23:32:15,861 INFO L208 MainTranslator]: Completed translation [2020-08-18 23:32:15,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:15 WrapperNode [2020-08-18 23:32:15,862 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 23:32:15,863 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 23:32:15,863 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 23:32:15,863 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 23:32:15,953 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:15" (1/1) ... [2020-08-18 23:32:15,953 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:15" (1/1) ... [2020-08-18 23:32:15,959 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:15" (1/1) ... [2020-08-18 23:32:15,960 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:15" (1/1) ... [2020-08-18 23:32:15,965 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:15" (1/1) ... [2020-08-18 23:32:15,980 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:15" (1/1) ... [2020-08-18 23:32:15,981 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:15" (1/1) ... [2020-08-18 23:32:15,983 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 23:32:15,984 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 23:32:15,984 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 23:32:15,984 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 23:32:15,985 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:15" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 23:32:16,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 23:32:16,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 23:32:16,041 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 23:32:16,042 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 23:32:16,042 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 23:32:16,042 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 23:32:16,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 23:32:16,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 23:32:16,297 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 23:32:16,298 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 23:32:16,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:32:16 BoogieIcfgContainer [2020-08-18 23:32:16,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 23:32:16,304 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 23:32:16,305 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 23:32:16,308 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 23:32:16,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:32:15" (1/3) ... [2020-08-18 23:32:16,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@205f9a89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:32:16, skipping insertion in model container [2020-08-18 23:32:16,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:15" (2/3) ... [2020-08-18 23:32:16,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@205f9a89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:32:16, skipping insertion in model container [2020-08-18 23:32:16,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:32:16" (3/3) ... [2020-08-18 23:32:16,312 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_7.c [2020-08-18 23:32:16,325 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 23:32:16,335 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 23:32:16,353 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 23:32:16,385 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 23:32:16,386 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 23:32:16,386 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 23:32:16,386 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 23:32:16,386 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 23:32:16,386 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 23:32:16,387 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 23:32:16,387 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 23:32:16,416 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-08-18 23:32:16,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 23:32:16,424 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:16,426 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:16,426 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:16,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:16,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1819770524, now seen corresponding path program 1 times [2020-08-18 23:32:16,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:16,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46039912] [2020-08-18 23:32:16,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:16,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:16,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:16,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:16,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:16,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46039912] [2020-08-18 23:32:16,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:16,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:16,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165284098] [2020-08-18 23:32:16,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:16,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:16,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:16,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:16,675 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-08-18 23:32:16,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:16,747 INFO L93 Difference]: Finished difference Result 69 states and 114 transitions. [2020-08-18 23:32:16,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:16,750 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-18 23:32:16,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:16,766 INFO L225 Difference]: With dead ends: 69 [2020-08-18 23:32:16,766 INFO L226 Difference]: Without dead ends: 54 [2020-08-18 23:32:16,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:16,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-18 23:32:16,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-08-18 23:32:16,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-18 23:32:16,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 65 transitions. [2020-08-18 23:32:16,833 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 65 transitions. Word has length 17 [2020-08-18 23:32:16,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:16,834 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 65 transitions. [2020-08-18 23:32:16,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:16,835 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 65 transitions. [2020-08-18 23:32:16,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 23:32:16,837 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:16,837 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:16,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 23:32:16,838 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:16,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:16,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1426743514, now seen corresponding path program 1 times [2020-08-18 23:32:16,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:16,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205214173] [2020-08-18 23:32:16,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:16,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:16,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:16,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:16,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:16,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205214173] [2020-08-18 23:32:16,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:16,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:16,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922331313] [2020-08-18 23:32:16,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:16,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:16,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:16,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:16,913 INFO L87 Difference]: Start difference. First operand 38 states and 65 transitions. Second operand 3 states. [2020-08-18 23:32:16,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:16,939 INFO L93 Difference]: Finished difference Result 87 states and 152 transitions. [2020-08-18 23:32:16,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:16,940 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-18 23:32:16,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:16,942 INFO L225 Difference]: With dead ends: 87 [2020-08-18 23:32:16,942 INFO L226 Difference]: Without dead ends: 54 [2020-08-18 23:32:16,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:16,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-18 23:32:16,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-08-18 23:32:16,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-18 23:32:16,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 89 transitions. [2020-08-18 23:32:16,954 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 89 transitions. Word has length 17 [2020-08-18 23:32:16,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:16,955 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 89 transitions. [2020-08-18 23:32:16,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:16,955 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 89 transitions. [2020-08-18 23:32:16,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 23:32:16,956 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:16,956 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:16,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 23:32:16,957 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:16,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:16,957 INFO L82 PathProgramCache]: Analyzing trace with hash 578525748, now seen corresponding path program 1 times [2020-08-18 23:32:16,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:16,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352474840] [2020-08-18 23:32:16,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:16,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:16,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:16,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:17,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:17,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352474840] [2020-08-18 23:32:17,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:17,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:17,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316890205] [2020-08-18 23:32:17,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:17,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:17,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:17,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:17,005 INFO L87 Difference]: Start difference. First operand 52 states and 89 transitions. Second operand 3 states. [2020-08-18 23:32:17,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:17,028 INFO L93 Difference]: Finished difference Result 81 states and 135 transitions. [2020-08-18 23:32:17,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:17,029 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 23:32:17,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:17,031 INFO L225 Difference]: With dead ends: 81 [2020-08-18 23:32:17,031 INFO L226 Difference]: Without dead ends: 57 [2020-08-18 23:32:17,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:17,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-18 23:32:17,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2020-08-18 23:32:17,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-18 23:32:17,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 91 transitions. [2020-08-18 23:32:17,046 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 91 transitions. Word has length 18 [2020-08-18 23:32:17,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:17,047 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 91 transitions. [2020-08-18 23:32:17,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:17,047 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 91 transitions. [2020-08-18 23:32:17,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 23:32:17,048 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:17,048 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:17,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 23:32:17,049 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:17,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:17,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1279590326, now seen corresponding path program 1 times [2020-08-18 23:32:17,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:17,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481177402] [2020-08-18 23:32:17,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:17,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:17,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:17,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:17,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:17,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481177402] [2020-08-18 23:32:17,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:17,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:17,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628853672] [2020-08-18 23:32:17,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:17,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:17,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:17,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:17,099 INFO L87 Difference]: Start difference. First operand 55 states and 91 transitions. Second operand 3 states. [2020-08-18 23:32:17,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:17,130 INFO L93 Difference]: Finished difference Result 100 states and 168 transitions. [2020-08-18 23:32:17,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:17,131 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 23:32:17,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:17,133 INFO L225 Difference]: With dead ends: 100 [2020-08-18 23:32:17,133 INFO L226 Difference]: Without dead ends: 98 [2020-08-18 23:32:17,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:17,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-08-18 23:32:17,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 72. [2020-08-18 23:32:17,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-18 23:32:17,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 120 transitions. [2020-08-18 23:32:17,145 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 120 transitions. Word has length 18 [2020-08-18 23:32:17,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:17,145 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 120 transitions. [2020-08-18 23:32:17,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:17,146 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 120 transitions. [2020-08-18 23:32:17,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 23:32:17,147 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:17,147 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:17,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 23:32:17,148 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:17,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:17,148 INFO L82 PathProgramCache]: Analyzing trace with hash 886563316, now seen corresponding path program 1 times [2020-08-18 23:32:17,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:17,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966807724] [2020-08-18 23:32:17,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:17,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:17,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:17,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:17,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:17,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966807724] [2020-08-18 23:32:17,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:17,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:17,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63777148] [2020-08-18 23:32:17,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:17,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:17,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:17,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:17,196 INFO L87 Difference]: Start difference. First operand 72 states and 120 transitions. Second operand 3 states. [2020-08-18 23:32:17,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:17,237 INFO L93 Difference]: Finished difference Result 164 states and 278 transitions. [2020-08-18 23:32:17,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:17,237 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 23:32:17,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:17,239 INFO L225 Difference]: With dead ends: 164 [2020-08-18 23:32:17,239 INFO L226 Difference]: Without dead ends: 100 [2020-08-18 23:32:17,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:17,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-18 23:32:17,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2020-08-18 23:32:17,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-08-18 23:32:17,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 162 transitions. [2020-08-18 23:32:17,253 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 162 transitions. Word has length 18 [2020-08-18 23:32:17,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:17,253 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 162 transitions. [2020-08-18 23:32:17,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:17,253 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 162 transitions. [2020-08-18 23:32:17,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 23:32:17,254 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:17,255 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:17,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 23:32:17,255 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:17,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:17,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1012809135, now seen corresponding path program 1 times [2020-08-18 23:32:17,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:17,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263931955] [2020-08-18 23:32:17,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:17,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:17,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:17,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:17,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:17,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263931955] [2020-08-18 23:32:17,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:17,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:17,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488906051] [2020-08-18 23:32:17,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:17,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:17,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:17,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:17,296 INFO L87 Difference]: Start difference. First operand 98 states and 162 transitions. Second operand 3 states. [2020-08-18 23:32:17,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:17,336 INFO L93 Difference]: Finished difference Result 147 states and 241 transitions. [2020-08-18 23:32:17,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:17,337 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 23:32:17,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:17,340 INFO L225 Difference]: With dead ends: 147 [2020-08-18 23:32:17,341 INFO L226 Difference]: Without dead ends: 102 [2020-08-18 23:32:17,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:17,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-08-18 23:32:17,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2020-08-18 23:32:17,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-18 23:32:17,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 162 transitions. [2020-08-18 23:32:17,363 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 162 transitions. Word has length 19 [2020-08-18 23:32:17,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:17,363 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 162 transitions. [2020-08-18 23:32:17,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:17,363 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 162 transitions. [2020-08-18 23:32:17,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 23:32:17,364 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:17,365 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:17,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 23:32:17,365 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:17,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:17,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1713873713, now seen corresponding path program 1 times [2020-08-18 23:32:17,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:17,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393599419] [2020-08-18 23:32:17,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:17,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:17,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:17,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:17,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:17,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393599419] [2020-08-18 23:32:17,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:17,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:17,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218621447] [2020-08-18 23:32:17,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:17,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:17,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:17,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:17,403 INFO L87 Difference]: Start difference. First operand 100 states and 162 transitions. Second operand 3 states. [2020-08-18 23:32:17,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:17,426 INFO L93 Difference]: Finished difference Result 180 states and 296 transitions. [2020-08-18 23:32:17,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:17,427 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 23:32:17,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:17,429 INFO L225 Difference]: With dead ends: 180 [2020-08-18 23:32:17,429 INFO L226 Difference]: Without dead ends: 178 [2020-08-18 23:32:17,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:17,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-18 23:32:17,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 136. [2020-08-18 23:32:17,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-18 23:32:17,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 218 transitions. [2020-08-18 23:32:17,444 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 218 transitions. Word has length 19 [2020-08-18 23:32:17,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:17,444 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 218 transitions. [2020-08-18 23:32:17,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:17,444 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 218 transitions. [2020-08-18 23:32:17,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 23:32:17,446 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:17,446 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:17,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 23:32:17,447 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:17,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:17,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1320846703, now seen corresponding path program 1 times [2020-08-18 23:32:17,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:17,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015400451] [2020-08-18 23:32:17,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:17,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:17,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:17,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:17,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:17,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015400451] [2020-08-18 23:32:17,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:17,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:17,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342287744] [2020-08-18 23:32:17,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:17,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:17,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:17,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:17,493 INFO L87 Difference]: Start difference. First operand 136 states and 218 transitions. Second operand 3 states. [2020-08-18 23:32:17,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:17,533 INFO L93 Difference]: Finished difference Result 312 states and 504 transitions. [2020-08-18 23:32:17,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:17,534 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 23:32:17,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:17,535 INFO L225 Difference]: With dead ends: 312 [2020-08-18 23:32:17,535 INFO L226 Difference]: Without dead ends: 186 [2020-08-18 23:32:17,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:17,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-08-18 23:32:17,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2020-08-18 23:32:17,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-08-18 23:32:17,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 290 transitions. [2020-08-18 23:32:17,550 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 290 transitions. Word has length 19 [2020-08-18 23:32:17,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:17,551 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 290 transitions. [2020-08-18 23:32:17,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:17,551 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 290 transitions. [2020-08-18 23:32:17,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 23:32:17,553 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:17,553 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:17,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 23:32:17,553 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:17,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:17,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1590692585, now seen corresponding path program 1 times [2020-08-18 23:32:17,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:17,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122033456] [2020-08-18 23:32:17,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:17,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:17,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:17,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:17,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:17,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122033456] [2020-08-18 23:32:17,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:17,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:17,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982616668] [2020-08-18 23:32:17,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:17,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:17,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:17,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:17,582 INFO L87 Difference]: Start difference. First operand 184 states and 290 transitions. Second operand 3 states. [2020-08-18 23:32:17,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:17,601 INFO L93 Difference]: Finished difference Result 276 states and 432 transitions. [2020-08-18 23:32:17,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:17,602 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 23:32:17,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:17,603 INFO L225 Difference]: With dead ends: 276 [2020-08-18 23:32:17,603 INFO L226 Difference]: Without dead ends: 190 [2020-08-18 23:32:17,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:17,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-08-18 23:32:17,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2020-08-18 23:32:17,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-18 23:32:17,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 290 transitions. [2020-08-18 23:32:17,616 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 290 transitions. Word has length 20 [2020-08-18 23:32:17,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:17,616 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 290 transitions. [2020-08-18 23:32:17,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:17,616 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 290 transitions. [2020-08-18 23:32:17,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 23:32:17,618 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:17,618 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:17,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 23:32:17,619 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:17,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:17,619 INFO L82 PathProgramCache]: Analyzing trace with hash -2003210133, now seen corresponding path program 1 times [2020-08-18 23:32:17,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:17,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85615964] [2020-08-18 23:32:17,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:17,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:17,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:17,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:17,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:17,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85615964] [2020-08-18 23:32:17,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:17,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:17,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070832449] [2020-08-18 23:32:17,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:17,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:17,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:17,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:17,648 INFO L87 Difference]: Start difference. First operand 188 states and 290 transitions. Second operand 3 states. [2020-08-18 23:32:17,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:17,669 INFO L93 Difference]: Finished difference Result 332 states and 520 transitions. [2020-08-18 23:32:17,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:17,670 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 23:32:17,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:17,672 INFO L225 Difference]: With dead ends: 332 [2020-08-18 23:32:17,672 INFO L226 Difference]: Without dead ends: 330 [2020-08-18 23:32:17,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:17,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-08-18 23:32:17,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 264. [2020-08-18 23:32:17,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-08-18 23:32:17,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 398 transitions. [2020-08-18 23:32:17,685 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 398 transitions. Word has length 20 [2020-08-18 23:32:17,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:17,686 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 398 transitions. [2020-08-18 23:32:17,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:17,686 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 398 transitions. [2020-08-18 23:32:17,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 23:32:17,688 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:17,688 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:17,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 23:32:17,689 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:17,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:17,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1898730153, now seen corresponding path program 1 times [2020-08-18 23:32:17,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:17,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886723953] [2020-08-18 23:32:17,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:17,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:17,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:17,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:17,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:17,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886723953] [2020-08-18 23:32:17,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:17,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:17,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474189859] [2020-08-18 23:32:17,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:17,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:17,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:17,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:17,720 INFO L87 Difference]: Start difference. First operand 264 states and 398 transitions. Second operand 3 states. [2020-08-18 23:32:17,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:17,746 INFO L93 Difference]: Finished difference Result 604 states and 912 transitions. [2020-08-18 23:32:17,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:17,747 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 23:32:17,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:17,749 INFO L225 Difference]: With dead ends: 604 [2020-08-18 23:32:17,749 INFO L226 Difference]: Without dead ends: 354 [2020-08-18 23:32:17,751 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:17,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-08-18 23:32:17,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 352. [2020-08-18 23:32:17,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-08-18 23:32:17,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 518 transitions. [2020-08-18 23:32:17,768 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 518 transitions. Word has length 20 [2020-08-18 23:32:17,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:17,768 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 518 transitions. [2020-08-18 23:32:17,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:17,768 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 518 transitions. [2020-08-18 23:32:17,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 23:32:17,771 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:17,771 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:17,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 23:32:17,771 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:17,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:17,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1969756604, now seen corresponding path program 1 times [2020-08-18 23:32:17,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:17,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922152618] [2020-08-18 23:32:17,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:17,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:17,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:17,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:17,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:17,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922152618] [2020-08-18 23:32:17,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:17,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:17,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546159087] [2020-08-18 23:32:17,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:17,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:17,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:17,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:17,799 INFO L87 Difference]: Start difference. First operand 352 states and 518 transitions. Second operand 3 states. [2020-08-18 23:32:17,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:17,821 INFO L93 Difference]: Finished difference Result 528 states and 772 transitions. [2020-08-18 23:32:17,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:17,821 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 23:32:17,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:17,824 INFO L225 Difference]: With dead ends: 528 [2020-08-18 23:32:17,824 INFO L226 Difference]: Without dead ends: 362 [2020-08-18 23:32:17,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:17,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-08-18 23:32:17,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 360. [2020-08-18 23:32:17,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-08-18 23:32:17,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 518 transitions. [2020-08-18 23:32:17,840 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 518 transitions. Word has length 21 [2020-08-18 23:32:17,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:17,841 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 518 transitions. [2020-08-18 23:32:17,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:17,841 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 518 transitions. [2020-08-18 23:32:17,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 23:32:17,843 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:17,843 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:17,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 23:32:17,843 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:17,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:17,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1268692026, now seen corresponding path program 1 times [2020-08-18 23:32:17,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:17,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790493934] [2020-08-18 23:32:17,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:17,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:17,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:17,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:17,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:17,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790493934] [2020-08-18 23:32:17,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:17,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:17,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733404211] [2020-08-18 23:32:17,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:17,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:17,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:17,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:17,887 INFO L87 Difference]: Start difference. First operand 360 states and 518 transitions. Second operand 3 states. [2020-08-18 23:32:17,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:17,918 INFO L93 Difference]: Finished difference Result 620 states and 904 transitions. [2020-08-18 23:32:17,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:17,920 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 23:32:17,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:17,925 INFO L225 Difference]: With dead ends: 620 [2020-08-18 23:32:17,925 INFO L226 Difference]: Without dead ends: 618 [2020-08-18 23:32:17,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:17,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2020-08-18 23:32:17,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 520. [2020-08-18 23:32:17,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2020-08-18 23:32:17,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 726 transitions. [2020-08-18 23:32:17,947 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 726 transitions. Word has length 21 [2020-08-18 23:32:17,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:17,948 INFO L479 AbstractCegarLoop]: Abstraction has 520 states and 726 transitions. [2020-08-18 23:32:17,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:17,948 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 726 transitions. [2020-08-18 23:32:17,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 23:32:17,951 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:17,951 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:17,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 23:32:17,952 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:17,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:17,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1661719036, now seen corresponding path program 1 times [2020-08-18 23:32:17,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:17,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817782263] [2020-08-18 23:32:17,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:17,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:18,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:18,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:18,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:18,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817782263] [2020-08-18 23:32:18,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:18,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:18,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709078476] [2020-08-18 23:32:18,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:18,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:18,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:18,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:18,008 INFO L87 Difference]: Start difference. First operand 520 states and 726 transitions. Second operand 3 states. [2020-08-18 23:32:18,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:18,048 INFO L93 Difference]: Finished difference Result 1180 states and 1640 transitions. [2020-08-18 23:32:18,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:18,049 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 23:32:18,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:18,053 INFO L225 Difference]: With dead ends: 1180 [2020-08-18 23:32:18,053 INFO L226 Difference]: Without dead ends: 682 [2020-08-18 23:32:18,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:18,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2020-08-18 23:32:18,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 680. [2020-08-18 23:32:18,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 680 states. [2020-08-18 23:32:18,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 918 transitions. [2020-08-18 23:32:18,081 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 918 transitions. Word has length 21 [2020-08-18 23:32:18,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:18,082 INFO L479 AbstractCegarLoop]: Abstraction has 680 states and 918 transitions. [2020-08-18 23:32:18,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:18,082 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 918 transitions. [2020-08-18 23:32:18,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 23:32:18,083 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:18,084 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:18,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 23:32:18,084 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:18,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:18,085 INFO L82 PathProgramCache]: Analyzing trace with hash -674531426, now seen corresponding path program 1 times [2020-08-18 23:32:18,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:18,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120210360] [2020-08-18 23:32:18,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:18,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:18,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:18,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:18,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:18,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120210360] [2020-08-18 23:32:18,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:18,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:18,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196692302] [2020-08-18 23:32:18,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:18,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:18,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:18,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:18,127 INFO L87 Difference]: Start difference. First operand 680 states and 918 transitions. Second operand 3 states. [2020-08-18 23:32:18,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:18,153 INFO L93 Difference]: Finished difference Result 1020 states and 1368 transitions. [2020-08-18 23:32:18,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:18,153 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 23:32:18,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:18,157 INFO L225 Difference]: With dead ends: 1020 [2020-08-18 23:32:18,157 INFO L226 Difference]: Without dead ends: 698 [2020-08-18 23:32:18,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:18,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2020-08-18 23:32:18,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 696. [2020-08-18 23:32:18,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 696 states. [2020-08-18 23:32:18,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 918 transitions. [2020-08-18 23:32:18,186 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 918 transitions. Word has length 22 [2020-08-18 23:32:18,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:18,187 INFO L479 AbstractCegarLoop]: Abstraction has 696 states and 918 transitions. [2020-08-18 23:32:18,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:18,187 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 918 transitions. [2020-08-18 23:32:18,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 23:32:18,189 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:18,189 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:18,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 23:32:18,189 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:18,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:18,190 INFO L82 PathProgramCache]: Analyzing trace with hash 26533152, now seen corresponding path program 1 times [2020-08-18 23:32:18,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:18,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625327097] [2020-08-18 23:32:18,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:18,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:18,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:18,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:18,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:18,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625327097] [2020-08-18 23:32:18,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:18,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:18,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167044911] [2020-08-18 23:32:18,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:18,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:18,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:18,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:18,217 INFO L87 Difference]: Start difference. First operand 696 states and 918 transitions. Second operand 3 states. [2020-08-18 23:32:18,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:18,258 INFO L93 Difference]: Finished difference Result 1164 states and 1544 transitions. [2020-08-18 23:32:18,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:18,259 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 23:32:18,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:18,265 INFO L225 Difference]: With dead ends: 1164 [2020-08-18 23:32:18,265 INFO L226 Difference]: Without dead ends: 1162 [2020-08-18 23:32:18,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:18,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2020-08-18 23:32:18,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1032. [2020-08-18 23:32:18,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2020-08-18 23:32:18,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1318 transitions. [2020-08-18 23:32:18,305 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1318 transitions. Word has length 22 [2020-08-18 23:32:18,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:18,305 INFO L479 AbstractCegarLoop]: Abstraction has 1032 states and 1318 transitions. [2020-08-18 23:32:18,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:18,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1318 transitions. [2020-08-18 23:32:18,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 23:32:18,308 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:18,308 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:18,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 23:32:18,308 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:18,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:18,309 INFO L82 PathProgramCache]: Analyzing trace with hash -366493858, now seen corresponding path program 1 times [2020-08-18 23:32:18,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:18,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983627406] [2020-08-18 23:32:18,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:18,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:18,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:18,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:18,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:18,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983627406] [2020-08-18 23:32:18,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:18,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:18,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462786856] [2020-08-18 23:32:18,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:18,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:18,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:18,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:18,349 INFO L87 Difference]: Start difference. First operand 1032 states and 1318 transitions. Second operand 3 states. [2020-08-18 23:32:18,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:18,391 INFO L93 Difference]: Finished difference Result 2316 states and 2920 transitions. [2020-08-18 23:32:18,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:18,392 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 23:32:18,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:18,399 INFO L225 Difference]: With dead ends: 2316 [2020-08-18 23:32:18,399 INFO L226 Difference]: Without dead ends: 1322 [2020-08-18 23:32:18,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:18,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2020-08-18 23:32:18,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1320. [2020-08-18 23:32:18,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1320 states. [2020-08-18 23:32:18,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1606 transitions. [2020-08-18 23:32:18,452 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1606 transitions. Word has length 22 [2020-08-18 23:32:18,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:18,452 INFO L479 AbstractCegarLoop]: Abstraction has 1320 states and 1606 transitions. [2020-08-18 23:32:18,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:18,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1606 transitions. [2020-08-18 23:32:18,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 23:32:18,456 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:18,456 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:18,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 23:32:18,456 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:18,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:18,457 INFO L82 PathProgramCache]: Analyzing trace with hash 822743769, now seen corresponding path program 1 times [2020-08-18 23:32:18,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:18,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798958109] [2020-08-18 23:32:18,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:18,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:18,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:18,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:18,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:18,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798958109] [2020-08-18 23:32:18,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:18,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:18,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118718248] [2020-08-18 23:32:18,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:18,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:18,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:18,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:18,494 INFO L87 Difference]: Start difference. First operand 1320 states and 1606 transitions. Second operand 3 states. [2020-08-18 23:32:18,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:18,556 INFO L93 Difference]: Finished difference Result 1980 states and 2392 transitions. [2020-08-18 23:32:18,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:18,557 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 23:32:18,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:18,565 INFO L225 Difference]: With dead ends: 1980 [2020-08-18 23:32:18,566 INFO L226 Difference]: Without dead ends: 1354 [2020-08-18 23:32:18,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:18,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-08-18 23:32:18,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1352. [2020-08-18 23:32:18,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1352 states. [2020-08-18 23:32:18,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 1606 transitions. [2020-08-18 23:32:18,630 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 1606 transitions. Word has length 23 [2020-08-18 23:32:18,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:18,632 INFO L479 AbstractCegarLoop]: Abstraction has 1352 states and 1606 transitions. [2020-08-18 23:32:18,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:18,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 1606 transitions. [2020-08-18 23:32:18,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 23:32:18,634 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:18,634 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:18,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 23:32:18,635 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:18,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:18,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1523808347, now seen corresponding path program 1 times [2020-08-18 23:32:18,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:18,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452373941] [2020-08-18 23:32:18,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:18,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:18,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:18,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:18,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:18,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452373941] [2020-08-18 23:32:18,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:18,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:18,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579373623] [2020-08-18 23:32:18,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:18,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:18,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:18,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:18,678 INFO L87 Difference]: Start difference. First operand 1352 states and 1606 transitions. Second operand 3 states. [2020-08-18 23:32:18,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:18,748 INFO L93 Difference]: Finished difference Result 2186 states and 2567 transitions. [2020-08-18 23:32:18,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:18,749 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 23:32:18,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:18,762 INFO L225 Difference]: With dead ends: 2186 [2020-08-18 23:32:18,763 INFO L226 Difference]: Without dead ends: 2184 [2020-08-18 23:32:18,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:18,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2020-08-18 23:32:18,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 2056. [2020-08-18 23:32:18,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2056 states. [2020-08-18 23:32:18,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 2374 transitions. [2020-08-18 23:32:18,835 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 2374 transitions. Word has length 23 [2020-08-18 23:32:18,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:18,836 INFO L479 AbstractCegarLoop]: Abstraction has 2056 states and 2374 transitions. [2020-08-18 23:32:18,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:18,836 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 2374 transitions. [2020-08-18 23:32:18,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 23:32:18,840 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:18,840 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:18,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 23:32:18,841 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:18,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:18,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1130781337, now seen corresponding path program 1 times [2020-08-18 23:32:18,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:18,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700458540] [2020-08-18 23:32:18,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:18,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:18,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:18,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:18,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:18,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700458540] [2020-08-18 23:32:18,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:18,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:18,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895271846] [2020-08-18 23:32:18,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:18,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:18,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:18,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:18,873 INFO L87 Difference]: Start difference. First operand 2056 states and 2374 transitions. Second operand 3 states. [2020-08-18 23:32:18,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:18,950 INFO L93 Difference]: Finished difference Result 4552 states and 5126 transitions. [2020-08-18 23:32:18,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:18,951 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 23:32:18,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:18,951 INFO L225 Difference]: With dead ends: 4552 [2020-08-18 23:32:18,951 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 23:32:18,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:18,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 23:32:18,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 23:32:18,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 23:32:18,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 23:32:18,959 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2020-08-18 23:32:18,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:18,959 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 23:32:18,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:18,959 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 23:32:18,960 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 23:32:18,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 23:32:18,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 23:32:19,002 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 23:32:19,003 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 23:32:19,003 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 23:32:19,003 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 23:32:19,004 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 23:32:19,004 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 23:32:19,004 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 121) no Hoare annotation was computed. [2020-08-18 23:32:19,004 INFO L268 CegarLoopResult]: For program point L102(line 102) no Hoare annotation was computed. [2020-08-18 23:32:19,004 INFO L268 CegarLoopResult]: For program point L86-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 23:32:19,004 INFO L271 CegarLoopResult]: At program point L111-1(lines 30 116) the Hoare annotation is: true [2020-08-18 23:32:19,004 INFO L268 CegarLoopResult]: For program point L87(line 87) no Hoare annotation was computed. [2020-08-18 23:32:19,004 INFO L268 CegarLoopResult]: For program point L112(line 112) no Hoare annotation was computed. [2020-08-18 23:32:19,005 INFO L264 CegarLoopResult]: At program point L112-1(lines 5 121) the Hoare annotation is: false [2020-08-18 23:32:19,005 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 121) no Hoare annotation was computed. [2020-08-18 23:32:19,005 INFO L268 CegarLoopResult]: For program point L71-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 23:32:19,005 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 119) no Hoare annotation was computed. [2020-08-18 23:32:19,005 INFO L268 CegarLoopResult]: For program point L96-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 23:32:19,005 INFO L268 CegarLoopResult]: For program point L63-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 23:32:19,005 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 121) the Hoare annotation is: true [2020-08-18 23:32:19,006 INFO L268 CegarLoopResult]: For program point L55-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 23:32:19,006 INFO L268 CegarLoopResult]: For program point L97(line 97) no Hoare annotation was computed. [2020-08-18 23:32:19,006 INFO L268 CegarLoopResult]: For program point L81-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 23:32:19,006 INFO L268 CegarLoopResult]: For program point L106-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 23:32:19,006 INFO L268 CegarLoopResult]: For program point L32(lines 32 34) no Hoare annotation was computed. [2020-08-18 23:32:19,006 INFO L268 CegarLoopResult]: For program point L82(line 82) no Hoare annotation was computed. [2020-08-18 23:32:19,008 INFO L268 CegarLoopResult]: For program point L107(line 107) no Hoare annotation was computed. [2020-08-18 23:32:19,008 INFO L268 CegarLoopResult]: For program point L91-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 23:32:19,008 INFO L268 CegarLoopResult]: For program point L75-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 23:32:19,009 INFO L268 CegarLoopResult]: For program point L67-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 23:32:19,009 INFO L268 CegarLoopResult]: For program point L92(line 92) no Hoare annotation was computed. [2020-08-18 23:32:19,009 INFO L268 CegarLoopResult]: For program point L59-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 23:32:19,009 INFO L271 CegarLoopResult]: At program point L117(lines 5 121) the Hoare annotation is: true [2020-08-18 23:32:19,009 INFO L268 CegarLoopResult]: For program point L51(lines 51 53) no Hoare annotation was computed. [2020-08-18 23:32:19,009 INFO L268 CegarLoopResult]: For program point L51-2(lines 30 116) no Hoare annotation was computed. [2020-08-18 23:32:19,009 INFO L268 CegarLoopResult]: For program point L101-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 23:32:19,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 11:32:19 BoogieIcfgContainer [2020-08-18 23:32:19,027 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 23:32:19,032 INFO L168 Benchmark]: Toolchain (without parser) took 3442.51 ms. Allocated memory was 140.0 MB in the beginning and 246.4 MB in the end (delta: 106.4 MB). Free memory was 103.5 MB in the beginning and 214.6 MB in the end (delta: -111.1 MB). Peak memory consumption was 115.4 MB. Max. memory is 7.1 GB. [2020-08-18 23:32:19,038 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 23:32:19,041 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.15 ms. Allocated memory is still 140.0 MB. Free memory was 103.3 MB in the beginning and 93.0 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-08-18 23:32:19,042 INFO L168 Benchmark]: Boogie Preprocessor took 120.61 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 93.0 MB in the beginning and 181.0 MB in the end (delta: -88.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-18 23:32:19,043 INFO L168 Benchmark]: RCFGBuilder took 319.09 ms. Allocated memory is still 202.9 MB. Free memory was 181.0 MB in the beginning and 164.2 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. [2020-08-18 23:32:19,044 INFO L168 Benchmark]: TraceAbstraction took 2722.96 ms. Allocated memory was 202.9 MB in the beginning and 246.4 MB in the end (delta: 43.5 MB). Free memory was 163.6 MB in the beginning and 214.6 MB in the end (delta: -51.0 MB). Peak memory consumption was 112.6 MB. Max. memory is 7.1 GB. [2020-08-18 23:32:19,050 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 273.15 ms. Allocated memory is still 140.0 MB. Free memory was 103.3 MB in the beginning and 93.0 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 120.61 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 93.0 MB in the beginning and 181.0 MB in the end (delta: -88.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 319.09 ms. Allocated memory is still 202.9 MB. Free memory was 181.0 MB in the beginning and 164.2 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2722.96 ms. Allocated memory was 202.9 MB in the beginning and 246.4 MB in the end (delta: 43.5 MB). Free memory was 163.6 MB in the beginning and 214.6 MB in the end (delta: -51.0 MB). Peak memory consumption was 112.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 119]: 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: 30]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.5s, OverallIterations: 20, TraceHistogramMax: 1, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1238 SDtfs, 574 SDslu, 829 SDs, 0 SdLazy, 107 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2056occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 20 MinimizatonAttempts, 530 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 138 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 403 NumberOfCodeBlocks, 403 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 383 ConstructedInterpolants, 0 QuantifiedInterpolants, 13856 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 20 InterpolantComputations, 20 PerfectInterpolantSequences, 0/0 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...