/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 15:44:06,771 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 15:44:06,774 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 15:44:06,815 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 15:44:06,815 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 15:44:06,829 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 15:44:06,830 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 15:44:06,833 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 15:44:06,836 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 15:44:06,838 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 15:44:06,839 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 15:44:06,842 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 15:44:06,843 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 15:44:06,846 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 15:44:06,849 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 15:44:06,850 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 15:44:06,852 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 15:44:06,854 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 15:44:06,856 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 15:44:06,862 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 15:44:06,864 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 15:44:06,864 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 15:44:06,867 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 15:44:06,868 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 15:44:06,872 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 15:44:06,884 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 15:44:06,885 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 15:44:06,886 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 15:44:06,887 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 15:44:06,933 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 15:44:06,933 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 15:44:06,936 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 15:44:06,936 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 15:44:06,936 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 15:44:06,936 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 15:44:06,937 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 15:44:06,937 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 15:44:06,937 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 15:44:06,937 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 15:44:06,938 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 15:44:06,939 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 15:44:06,939 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 15:44:06,939 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 15:44:06,940 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 15:44:06,940 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 15:44:06,940 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 15:44:06,940 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 15:44:06,940 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 15:44:06,941 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 15:44:06,941 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 15:44:06,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 15:44:06,941 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 15:44:06,941 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 15:44:06,942 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 15:44:06,942 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 15:44:06,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 15:44:06,942 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 15:44:06,942 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 15:44:06,942 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 15:44:07,234 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 15:44:07,247 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 15:44:07,251 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 15:44:07,252 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 15:44:07,253 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 15:44:07,254 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_10.c [2020-08-21 15:44:07,332 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/88fbbe1d7/86d78997881744c5b10aa738c8ca0f60/FLAG2aafadb09 [2020-08-21 15:44:07,814 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 15:44:07,814 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_10.c [2020-08-21 15:44:07,821 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/88fbbe1d7/86d78997881744c5b10aa738c8ca0f60/FLAG2aafadb09 [2020-08-21 15:44:08,191 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/88fbbe1d7/86d78997881744c5b10aa738c8ca0f60 [2020-08-21 15:44:08,202 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 15:44:08,204 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 15:44:08,207 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 15:44:08,207 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 15:44:08,211 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 15:44:08,212 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:44:08" (1/1) ... [2020-08-21 15:44:08,216 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41357594 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:08, skipping insertion in model container [2020-08-21 15:44:08,216 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:44:08" (1/1) ... [2020-08-21 15:44:08,225 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 15:44:08,256 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 15:44:08,483 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:44:08,488 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 15:44:08,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:44:08,524 INFO L208 MainTranslator]: Completed translation [2020-08-21 15:44:08,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:08 WrapperNode [2020-08-21 15:44:08,525 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 15:44:08,526 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 15:44:08,526 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 15:44:08,526 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 15:44:08,617 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:08" (1/1) ... [2020-08-21 15:44:08,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:08" (1/1) ... [2020-08-21 15:44:08,624 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:08" (1/1) ... [2020-08-21 15:44:08,624 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:08" (1/1) ... [2020-08-21 15:44:08,630 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:08" (1/1) ... [2020-08-21 15:44:08,637 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:08" (1/1) ... [2020-08-21 15:44:08,639 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:08" (1/1) ... [2020-08-21 15:44:08,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 15:44:08,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 15:44:08,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 15:44:08,643 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 15:44:08,644 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 15:44:08,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 15:44:08,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 15:44:08,708 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 15:44:08,709 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 15:44:08,709 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 15:44:08,709 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 15:44:08,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 15:44:08,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 15:44:09,040 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 15:44:09,041 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 15:44:09,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:44:09 BoogieIcfgContainer [2020-08-21 15:44:09,046 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 15:44:09,057 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 15:44:09,057 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 15:44:09,060 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 15:44:09,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 03:44:08" (1/3) ... [2020-08-21 15:44:09,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c6223f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:44:09, skipping insertion in model container [2020-08-21 15:44:09,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:44:08" (2/3) ... [2020-08-21 15:44:09,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c6223f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:44:09, skipping insertion in model container [2020-08-21 15:44:09,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:44:09" (3/3) ... [2020-08-21 15:44:09,064 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_10.c [2020-08-21 15:44:09,075 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 15:44:09,082 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 15:44:09,102 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 15:44:09,125 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 15:44:09,125 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 15:44:09,125 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 15:44:09,126 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 15:44:09,126 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 15:44:09,126 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 15:44:09,126 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 15:44:09,126 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 15:44:09,144 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-08-21 15:44:09,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 15:44:09,150 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:09,151 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] [2020-08-21 15:44:09,152 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:09,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:09,157 INFO L82 PathProgramCache]: Analyzing trace with hash -917347053, now seen corresponding path program 1 times [2020-08-21 15:44:09,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:09,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122165382] [2020-08-21 15:44:09,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:09,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:09,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:09,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:09,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:09,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122165382] [2020-08-21 15:44:09,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:09,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:09,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297253035] [2020-08-21 15:44:09,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:09,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:09,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:09,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:09,386 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-08-21 15:44:09,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:09,446 INFO L93 Difference]: Finished difference Result 87 states and 150 transitions. [2020-08-21 15:44:09,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:09,449 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 15:44:09,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:09,462 INFO L225 Difference]: With dead ends: 87 [2020-08-21 15:44:09,462 INFO L226 Difference]: Without dead ends: 72 [2020-08-21 15:44:09,466 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 [2020-08-21 15:44:09,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-21 15:44:09,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-08-21 15:44:09,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-21 15:44:09,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 89 transitions. [2020-08-21 15:44:09,515 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 89 transitions. Word has length 20 [2020-08-21 15:44:09,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:09,516 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 89 transitions. [2020-08-21 15:44:09,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:09,516 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 89 transitions. [2020-08-21 15:44:09,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 15:44:09,517 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:09,518 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] [2020-08-21 15:44:09,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 15:44:09,518 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:09,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:09,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1504153067, now seen corresponding path program 1 times [2020-08-21 15:44:09,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:09,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410075624] [2020-08-21 15:44:09,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:09,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:09,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:09,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:09,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:09,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410075624] [2020-08-21 15:44:09,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:09,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:09,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526041010] [2020-08-21 15:44:09,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:09,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:09,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:09,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:09,609 INFO L87 Difference]: Start difference. First operand 50 states and 89 transitions. Second operand 3 states. [2020-08-21 15:44:09,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:09,661 INFO L93 Difference]: Finished difference Result 117 states and 212 transitions. [2020-08-21 15:44:09,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:09,662 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 15:44:09,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:09,664 INFO L225 Difference]: With dead ends: 117 [2020-08-21 15:44:09,664 INFO L226 Difference]: Without dead ends: 72 [2020-08-21 15:44:09,666 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 [2020-08-21 15:44:09,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-21 15:44:09,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-08-21 15:44:09,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-21 15:44:09,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 125 transitions. [2020-08-21 15:44:09,678 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 125 transitions. Word has length 20 [2020-08-21 15:44:09,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:09,679 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 125 transitions. [2020-08-21 15:44:09,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:09,679 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 125 transitions. [2020-08-21 15:44:09,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 15:44:09,680 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:09,681 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] [2020-08-21 15:44:09,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 15:44:09,681 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:09,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:09,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1627225809, now seen corresponding path program 1 times [2020-08-21 15:44:09,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:09,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502742628] [2020-08-21 15:44:09,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:09,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:09,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:09,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:09,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:09,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502742628] [2020-08-21 15:44:09,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:09,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:09,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197653083] [2020-08-21 15:44:09,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:09,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:09,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:09,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:09,742 INFO L87 Difference]: Start difference. First operand 70 states and 125 transitions. Second operand 3 states. [2020-08-21 15:44:09,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:09,765 INFO L93 Difference]: Finished difference Result 108 states and 189 transitions. [2020-08-21 15:44:09,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:09,766 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 15:44:09,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:09,767 INFO L225 Difference]: With dead ends: 108 [2020-08-21 15:44:09,767 INFO L226 Difference]: Without dead ends: 75 [2020-08-21 15:44:09,768 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 [2020-08-21 15:44:09,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-21 15:44:09,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-08-21 15:44:09,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-21 15:44:09,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 127 transitions. [2020-08-21 15:44:09,780 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 127 transitions. Word has length 21 [2020-08-21 15:44:09,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:09,780 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 127 transitions. [2020-08-21 15:44:09,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:09,781 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 127 transitions. [2020-08-21 15:44:09,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 15:44:09,782 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:09,782 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] [2020-08-21 15:44:09,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 15:44:09,782 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:09,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:09,783 INFO L82 PathProgramCache]: Analyzing trace with hash 616108559, now seen corresponding path program 1 times [2020-08-21 15:44:09,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:09,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794449169] [2020-08-21 15:44:09,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:09,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:09,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:09,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:09,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:09,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794449169] [2020-08-21 15:44:09,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:09,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:09,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377340133] [2020-08-21 15:44:09,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:09,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:09,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:09,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:09,862 INFO L87 Difference]: Start difference. First operand 73 states and 127 transitions. Second operand 3 states. [2020-08-21 15:44:09,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:09,912 INFO L93 Difference]: Finished difference Result 136 states and 240 transitions. [2020-08-21 15:44:09,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:09,912 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 15:44:09,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:09,914 INFO L225 Difference]: With dead ends: 136 [2020-08-21 15:44:09,915 INFO L226 Difference]: Without dead ends: 134 [2020-08-21 15:44:09,915 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 [2020-08-21 15:44:09,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-08-21 15:44:09,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 96. [2020-08-21 15:44:09,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-21 15:44:09,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 168 transitions. [2020-08-21 15:44:09,930 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 168 transitions. Word has length 21 [2020-08-21 15:44:09,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:09,930 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 168 transitions. [2020-08-21 15:44:09,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:09,931 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 168 transitions. [2020-08-21 15:44:09,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 15:44:09,932 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:09,932 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] [2020-08-21 15:44:09,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 15:44:09,932 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:09,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:09,933 INFO L82 PathProgramCache]: Analyzing trace with hash 29302545, now seen corresponding path program 1 times [2020-08-21 15:44:09,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:09,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906120780] [2020-08-21 15:44:09,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:09,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:09,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:09,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:09,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:09,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906120780] [2020-08-21 15:44:09,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:09,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:09,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748925986] [2020-08-21 15:44:09,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:09,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:09,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:09,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:09,983 INFO L87 Difference]: Start difference. First operand 96 states and 168 transitions. Second operand 3 states. [2020-08-21 15:44:10,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:10,016 INFO L93 Difference]: Finished difference Result 224 states and 398 transitions. [2020-08-21 15:44:10,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:10,017 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 15:44:10,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:10,019 INFO L225 Difference]: With dead ends: 224 [2020-08-21 15:44:10,019 INFO L226 Difference]: Without dead ends: 136 [2020-08-21 15:44:10,020 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 [2020-08-21 15:44:10,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-21 15:44:10,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-08-21 15:44:10,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-08-21 15:44:10,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 234 transitions. [2020-08-21 15:44:10,053 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 234 transitions. Word has length 21 [2020-08-21 15:44:10,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:10,053 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 234 transitions. [2020-08-21 15:44:10,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:10,054 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 234 transitions. [2020-08-21 15:44:10,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 15:44:10,056 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:10,056 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] [2020-08-21 15:44:10,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 15:44:10,057 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:10,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:10,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1919709866, now seen corresponding path program 1 times [2020-08-21 15:44:10,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:10,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659768238] [2020-08-21 15:44:10,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:10,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:10,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:10,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:10,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:10,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659768238] [2020-08-21 15:44:10,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:10,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:10,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444533137] [2020-08-21 15:44:10,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:10,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:10,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:10,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:10,144 INFO L87 Difference]: Start difference. First operand 134 states and 234 transitions. Second operand 3 states. [2020-08-21 15:44:10,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:10,162 INFO L93 Difference]: Finished difference Result 201 states and 349 transitions. [2020-08-21 15:44:10,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:10,163 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 15:44:10,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:10,165 INFO L225 Difference]: With dead ends: 201 [2020-08-21 15:44:10,165 INFO L226 Difference]: Without dead ends: 138 [2020-08-21 15:44:10,166 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 [2020-08-21 15:44:10,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-21 15:44:10,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-08-21 15:44:10,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-21 15:44:10,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 234 transitions. [2020-08-21 15:44:10,182 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 234 transitions. Word has length 22 [2020-08-21 15:44:10,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:10,183 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 234 transitions. [2020-08-21 15:44:10,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:10,183 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 234 transitions. [2020-08-21 15:44:10,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 15:44:10,184 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:10,185 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] [2020-08-21 15:44:10,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 15:44:10,185 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:10,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:10,199 INFO L82 PathProgramCache]: Analyzing trace with hash 908592616, now seen corresponding path program 1 times [2020-08-21 15:44:10,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:10,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735383797] [2020-08-21 15:44:10,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:10,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:10,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:10,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:10,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:10,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735383797] [2020-08-21 15:44:10,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:10,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:10,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517832789] [2020-08-21 15:44:10,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:10,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:10,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:10,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:10,271 INFO L87 Difference]: Start difference. First operand 136 states and 234 transitions. Second operand 3 states. [2020-08-21 15:44:10,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:10,289 INFO L93 Difference]: Finished difference Result 252 states and 440 transitions. [2020-08-21 15:44:10,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:10,290 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 15:44:10,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:10,292 INFO L225 Difference]: With dead ends: 252 [2020-08-21 15:44:10,292 INFO L226 Difference]: Without dead ends: 250 [2020-08-21 15:44:10,293 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 [2020-08-21 15:44:10,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-21 15:44:10,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 184. [2020-08-21 15:44:10,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-08-21 15:44:10,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 314 transitions. [2020-08-21 15:44:10,306 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 314 transitions. Word has length 22 [2020-08-21 15:44:10,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:10,306 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 314 transitions. [2020-08-21 15:44:10,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:10,306 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 314 transitions. [2020-08-21 15:44:10,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 15:44:10,308 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:10,308 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] [2020-08-21 15:44:10,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 15:44:10,309 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:10,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:10,309 INFO L82 PathProgramCache]: Analyzing trace with hash 321786602, now seen corresponding path program 1 times [2020-08-21 15:44:10,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:10,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399274232] [2020-08-21 15:44:10,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:10,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:10,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:10,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:10,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:10,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399274232] [2020-08-21 15:44:10,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:10,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:10,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294760408] [2020-08-21 15:44:10,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:10,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:10,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:10,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:10,341 INFO L87 Difference]: Start difference. First operand 184 states and 314 transitions. Second operand 3 states. [2020-08-21 15:44:10,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:10,365 INFO L93 Difference]: Finished difference Result 432 states and 744 transitions. [2020-08-21 15:44:10,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:10,365 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 15:44:10,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:10,367 INFO L225 Difference]: With dead ends: 432 [2020-08-21 15:44:10,368 INFO L226 Difference]: Without dead ends: 258 [2020-08-21 15:44:10,369 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 [2020-08-21 15:44:10,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-08-21 15:44:10,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-08-21 15:44:10,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-21 15:44:10,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 434 transitions. [2020-08-21 15:44:10,383 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 434 transitions. Word has length 22 [2020-08-21 15:44:10,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:10,383 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 434 transitions. [2020-08-21 15:44:10,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:10,384 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 434 transitions. [2020-08-21 15:44:10,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 15:44:10,386 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:10,386 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] [2020-08-21 15:44:10,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 15:44:10,386 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:10,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:10,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1898185914, now seen corresponding path program 1 times [2020-08-21 15:44:10,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:10,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508764414] [2020-08-21 15:44:10,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:10,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:10,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:10,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:10,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:10,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508764414] [2020-08-21 15:44:10,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:10,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:10,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087760339] [2020-08-21 15:44:10,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:10,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:10,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:10,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:10,415 INFO L87 Difference]: Start difference. First operand 256 states and 434 transitions. Second operand 3 states. [2020-08-21 15:44:10,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:10,437 INFO L93 Difference]: Finished difference Result 384 states and 648 transitions. [2020-08-21 15:44:10,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:10,437 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 15:44:10,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:10,439 INFO L225 Difference]: With dead ends: 384 [2020-08-21 15:44:10,439 INFO L226 Difference]: Without dead ends: 262 [2020-08-21 15:44:10,440 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 [2020-08-21 15:44:10,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-08-21 15:44:10,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2020-08-21 15:44:10,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-08-21 15:44:10,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 434 transitions. [2020-08-21 15:44:10,452 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 434 transitions. Word has length 23 [2020-08-21 15:44:10,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:10,453 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 434 transitions. [2020-08-21 15:44:10,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:10,453 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 434 transitions. [2020-08-21 15:44:10,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 15:44:10,455 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:10,455 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] [2020-08-21 15:44:10,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 15:44:10,455 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:10,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:10,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1385664132, now seen corresponding path program 1 times [2020-08-21 15:44:10,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:10,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822849389] [2020-08-21 15:44:10,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:10,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:10,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:10,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:10,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:10,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822849389] [2020-08-21 15:44:10,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:10,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:10,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285534868] [2020-08-21 15:44:10,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:10,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:10,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:10,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:10,495 INFO L87 Difference]: Start difference. First operand 260 states and 434 transitions. Second operand 3 states. [2020-08-21 15:44:10,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:10,524 INFO L93 Difference]: Finished difference Result 476 states and 808 transitions. [2020-08-21 15:44:10,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:10,525 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 15:44:10,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:10,528 INFO L225 Difference]: With dead ends: 476 [2020-08-21 15:44:10,528 INFO L226 Difference]: Without dead ends: 474 [2020-08-21 15:44:10,529 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 [2020-08-21 15:44:10,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-08-21 15:44:10,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 360. [2020-08-21 15:44:10,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-08-21 15:44:10,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 590 transitions. [2020-08-21 15:44:10,545 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 590 transitions. Word has length 23 [2020-08-21 15:44:10,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:10,545 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 590 transitions. [2020-08-21 15:44:10,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:10,545 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 590 transitions. [2020-08-21 15:44:10,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 15:44:10,547 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:10,547 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] [2020-08-21 15:44:10,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 15:44:10,548 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:10,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:10,548 INFO L82 PathProgramCache]: Analyzing trace with hash 798858118, now seen corresponding path program 1 times [2020-08-21 15:44:10,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:10,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662748798] [2020-08-21 15:44:10,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:10,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:10,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:10,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:10,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:10,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662748798] [2020-08-21 15:44:10,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:10,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:10,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083835439] [2020-08-21 15:44:10,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:10,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:10,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:10,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:10,576 INFO L87 Difference]: Start difference. First operand 360 states and 590 transitions. Second operand 3 states. [2020-08-21 15:44:10,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:10,600 INFO L93 Difference]: Finished difference Result 844 states and 1392 transitions. [2020-08-21 15:44:10,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:10,601 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 15:44:10,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:10,604 INFO L225 Difference]: With dead ends: 844 [2020-08-21 15:44:10,604 INFO L226 Difference]: Without dead ends: 498 [2020-08-21 15:44:10,605 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 [2020-08-21 15:44:10,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-08-21 15:44:10,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 496. [2020-08-21 15:44:10,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2020-08-21 15:44:10,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 806 transitions. [2020-08-21 15:44:10,623 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 806 transitions. Word has length 23 [2020-08-21 15:44:10,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:10,623 INFO L479 AbstractCegarLoop]: Abstraction has 496 states and 806 transitions. [2020-08-21 15:44:10,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:10,623 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 806 transitions. [2020-08-21 15:44:10,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 15:44:10,625 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:10,625 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:10,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 15:44:10,625 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:10,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:10,626 INFO L82 PathProgramCache]: Analyzing trace with hash 6129535, now seen corresponding path program 1 times [2020-08-21 15:44:10,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:10,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936387106] [2020-08-21 15:44:10,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:10,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:10,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:10,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:10,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:10,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936387106] [2020-08-21 15:44:10,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:10,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:10,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539759117] [2020-08-21 15:44:10,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:10,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:10,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:10,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:10,668 INFO L87 Difference]: Start difference. First operand 496 states and 806 transitions. Second operand 3 states. [2020-08-21 15:44:10,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:10,692 INFO L93 Difference]: Finished difference Result 744 states and 1204 transitions. [2020-08-21 15:44:10,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:10,693 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 15:44:10,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:10,696 INFO L225 Difference]: With dead ends: 744 [2020-08-21 15:44:10,697 INFO L226 Difference]: Without dead ends: 506 [2020-08-21 15:44:10,698 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 [2020-08-21 15:44:10,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-08-21 15:44:10,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 504. [2020-08-21 15:44:10,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-08-21 15:44:10,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 806 transitions. [2020-08-21 15:44:10,716 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 806 transitions. Word has length 24 [2020-08-21 15:44:10,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:10,716 INFO L479 AbstractCegarLoop]: Abstraction has 504 states and 806 transitions. [2020-08-21 15:44:10,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:10,717 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 806 transitions. [2020-08-21 15:44:10,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 15:44:10,718 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:10,718 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:10,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 15:44:10,719 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:10,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:10,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1004987715, now seen corresponding path program 1 times [2020-08-21 15:44:10,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:10,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509832448] [2020-08-21 15:44:10,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:10,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:10,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:10,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:10,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:10,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509832448] [2020-08-21 15:44:10,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:10,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:10,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920336651] [2020-08-21 15:44:10,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:10,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:10,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:10,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:10,772 INFO L87 Difference]: Start difference. First operand 504 states and 806 transitions. Second operand 3 states. [2020-08-21 15:44:10,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:10,804 INFO L93 Difference]: Finished difference Result 908 states and 1480 transitions. [2020-08-21 15:44:10,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:10,807 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 15:44:10,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:10,814 INFO L225 Difference]: With dead ends: 908 [2020-08-21 15:44:10,814 INFO L226 Difference]: Without dead ends: 906 [2020-08-21 15:44:10,815 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 [2020-08-21 15:44:10,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2020-08-21 15:44:10,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 712. [2020-08-21 15:44:10,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-08-21 15:44:10,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1110 transitions. [2020-08-21 15:44:10,845 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1110 transitions. Word has length 24 [2020-08-21 15:44:10,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:10,846 INFO L479 AbstractCegarLoop]: Abstraction has 712 states and 1110 transitions. [2020-08-21 15:44:10,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:10,846 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1110 transitions. [2020-08-21 15:44:10,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 15:44:10,848 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:10,848 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:10,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 15:44:10,849 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:10,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:10,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1591793729, now seen corresponding path program 1 times [2020-08-21 15:44:10,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:10,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [763898466] [2020-08-21 15:44:10,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:10,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:10,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:10,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:10,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:10,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [763898466] [2020-08-21 15:44:10,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:10,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:10,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299328794] [2020-08-21 15:44:10,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:10,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:10,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:10,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:10,909 INFO L87 Difference]: Start difference. First operand 712 states and 1110 transitions. Second operand 3 states. [2020-08-21 15:44:10,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:10,953 INFO L93 Difference]: Finished difference Result 1660 states and 2600 transitions. [2020-08-21 15:44:10,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:10,954 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 15:44:10,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:10,960 INFO L225 Difference]: With dead ends: 1660 [2020-08-21 15:44:10,960 INFO L226 Difference]: Without dead ends: 970 [2020-08-21 15:44:10,964 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 [2020-08-21 15:44:10,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-08-21 15:44:11,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 968. [2020-08-21 15:44:11,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 968 states. [2020-08-21 15:44:11,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1494 transitions. [2020-08-21 15:44:11,010 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1494 transitions. Word has length 24 [2020-08-21 15:44:11,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:11,010 INFO L479 AbstractCegarLoop]: Abstraction has 968 states and 1494 transitions. [2020-08-21 15:44:11,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:11,011 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1494 transitions. [2020-08-21 15:44:11,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 15:44:11,013 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:11,014 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:11,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 15:44:11,014 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:11,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:11,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1089633349, now seen corresponding path program 1 times [2020-08-21 15:44:11,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:11,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264145811] [2020-08-21 15:44:11,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:11,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:11,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:11,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:11,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:11,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264145811] [2020-08-21 15:44:11,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:11,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:11,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205229414] [2020-08-21 15:44:11,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:11,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:11,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:11,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:11,057 INFO L87 Difference]: Start difference. First operand 968 states and 1494 transitions. Second operand 3 states. [2020-08-21 15:44:11,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:11,115 INFO L93 Difference]: Finished difference Result 1452 states and 2232 transitions. [2020-08-21 15:44:11,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:11,116 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 15:44:11,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:11,122 INFO L225 Difference]: With dead ends: 1452 [2020-08-21 15:44:11,123 INFO L226 Difference]: Without dead ends: 986 [2020-08-21 15:44:11,126 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 [2020-08-21 15:44:11,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2020-08-21 15:44:11,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 984. [2020-08-21 15:44:11,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 984 states. [2020-08-21 15:44:11,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1494 transitions. [2020-08-21 15:44:11,160 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1494 transitions. Word has length 25 [2020-08-21 15:44:11,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:11,163 INFO L479 AbstractCegarLoop]: Abstraction has 984 states and 1494 transitions. [2020-08-21 15:44:11,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:11,163 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1494 transitions. [2020-08-21 15:44:11,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 15:44:11,166 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:11,166 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:11,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 15:44:11,167 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:11,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:11,167 INFO L82 PathProgramCache]: Analyzing trace with hash -2100750599, now seen corresponding path program 1 times [2020-08-21 15:44:11,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:11,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505316961] [2020-08-21 15:44:11,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:11,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:11,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:11,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:11,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:11,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505316961] [2020-08-21 15:44:11,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:11,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:11,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404754540] [2020-08-21 15:44:11,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:11,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:11,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:11,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:11,203 INFO L87 Difference]: Start difference. First operand 984 states and 1494 transitions. Second operand 3 states. [2020-08-21 15:44:11,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:11,244 INFO L93 Difference]: Finished difference Result 1740 states and 2696 transitions. [2020-08-21 15:44:11,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:11,245 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 15:44:11,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:11,254 INFO L225 Difference]: With dead ends: 1740 [2020-08-21 15:44:11,255 INFO L226 Difference]: Without dead ends: 1738 [2020-08-21 15:44:11,256 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 [2020-08-21 15:44:11,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-08-21 15:44:11,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1416. [2020-08-21 15:44:11,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1416 states. [2020-08-21 15:44:11,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2086 transitions. [2020-08-21 15:44:11,303 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2086 transitions. Word has length 25 [2020-08-21 15:44:11,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:11,304 INFO L479 AbstractCegarLoop]: Abstraction has 1416 states and 2086 transitions. [2020-08-21 15:44:11,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:11,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2086 transitions. [2020-08-21 15:44:11,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 15:44:11,307 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:11,307 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:11,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 15:44:11,308 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:11,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:11,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1607410683, now seen corresponding path program 1 times [2020-08-21 15:44:11,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:11,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205316641] [2020-08-21 15:44:11,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:11,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:11,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:11,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:11,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:11,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205316641] [2020-08-21 15:44:11,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:11,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:11,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273869647] [2020-08-21 15:44:11,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:11,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:11,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:11,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:11,333 INFO L87 Difference]: Start difference. First operand 1416 states and 2086 transitions. Second operand 3 states. [2020-08-21 15:44:11,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:11,381 INFO L93 Difference]: Finished difference Result 3276 states and 4840 transitions. [2020-08-21 15:44:11,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:11,382 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 15:44:11,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:11,391 INFO L225 Difference]: With dead ends: 3276 [2020-08-21 15:44:11,392 INFO L226 Difference]: Without dead ends: 1898 [2020-08-21 15:44:11,395 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 [2020-08-21 15:44:11,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2020-08-21 15:44:11,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1896. [2020-08-21 15:44:11,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1896 states. [2020-08-21 15:44:11,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2758 transitions. [2020-08-21 15:44:11,457 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2758 transitions. Word has length 25 [2020-08-21 15:44:11,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:11,457 INFO L479 AbstractCegarLoop]: Abstraction has 1896 states and 2758 transitions. [2020-08-21 15:44:11,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:11,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2758 transitions. [2020-08-21 15:44:11,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 15:44:11,460 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:11,461 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:11,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 15:44:11,461 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:11,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:11,461 INFO L82 PathProgramCache]: Analyzing trace with hash -698544044, now seen corresponding path program 1 times [2020-08-21 15:44:11,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:11,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425856255] [2020-08-21 15:44:11,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:11,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:11,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:11,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:11,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:11,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425856255] [2020-08-21 15:44:11,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:11,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:11,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534657498] [2020-08-21 15:44:11,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:11,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:11,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:11,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:11,489 INFO L87 Difference]: Start difference. First operand 1896 states and 2758 transitions. Second operand 3 states. [2020-08-21 15:44:11,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:11,531 INFO L93 Difference]: Finished difference Result 2844 states and 4120 transitions. [2020-08-21 15:44:11,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:11,532 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 15:44:11,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:11,541 INFO L225 Difference]: With dead ends: 2844 [2020-08-21 15:44:11,542 INFO L226 Difference]: Without dead ends: 1930 [2020-08-21 15:44:11,544 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 [2020-08-21 15:44:11,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-21 15:44:11,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1928. [2020-08-21 15:44:11,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1928 states. [2020-08-21 15:44:11,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 2758 transitions. [2020-08-21 15:44:11,600 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 2758 transitions. Word has length 26 [2020-08-21 15:44:11,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:11,600 INFO L479 AbstractCegarLoop]: Abstraction has 1928 states and 2758 transitions. [2020-08-21 15:44:11,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:11,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 2758 transitions. [2020-08-21 15:44:11,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 15:44:11,603 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:11,603 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:11,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 15:44:11,604 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:11,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:11,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1709661294, now seen corresponding path program 1 times [2020-08-21 15:44:11,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:11,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700944861] [2020-08-21 15:44:11,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:11,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:11,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:11,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:11,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:11,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700944861] [2020-08-21 15:44:11,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:11,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:11,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050542443] [2020-08-21 15:44:11,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:11,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:11,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:11,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:11,631 INFO L87 Difference]: Start difference. First operand 1928 states and 2758 transitions. Second operand 3 states. [2020-08-21 15:44:11,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:11,728 INFO L93 Difference]: Finished difference Result 3340 states and 4872 transitions. [2020-08-21 15:44:11,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:11,729 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 15:44:11,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:11,751 INFO L225 Difference]: With dead ends: 3340 [2020-08-21 15:44:11,751 INFO L226 Difference]: Without dead ends: 3338 [2020-08-21 15:44:11,752 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 [2020-08-21 15:44:11,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-08-21 15:44:11,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 2824. [2020-08-21 15:44:11,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2824 states. [2020-08-21 15:44:11,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 3910 transitions. [2020-08-21 15:44:11,857 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 3910 transitions. Word has length 26 [2020-08-21 15:44:11,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:11,858 INFO L479 AbstractCegarLoop]: Abstraction has 2824 states and 3910 transitions. [2020-08-21 15:44:11,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:11,858 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 3910 transitions. [2020-08-21 15:44:11,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 15:44:11,864 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:11,864 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:11,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 15:44:11,865 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:11,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:11,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1998499988, now seen corresponding path program 1 times [2020-08-21 15:44:11,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:11,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767678680] [2020-08-21 15:44:11,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:11,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:11,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:11,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:11,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:11,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767678680] [2020-08-21 15:44:11,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:11,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:11,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124817788] [2020-08-21 15:44:11,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:11,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:11,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:11,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:11,892 INFO L87 Difference]: Start difference. First operand 2824 states and 3910 transitions. Second operand 3 states. [2020-08-21 15:44:11,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:11,988 INFO L93 Difference]: Finished difference Result 6476 states and 8968 transitions. [2020-08-21 15:44:11,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:11,989 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 15:44:11,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:12,007 INFO L225 Difference]: With dead ends: 6476 [2020-08-21 15:44:12,008 INFO L226 Difference]: Without dead ends: 3722 [2020-08-21 15:44:12,014 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 [2020-08-21 15:44:12,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-21 15:44:12,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3720. [2020-08-21 15:44:12,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3720 states. [2020-08-21 15:44:12,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 5062 transitions. [2020-08-21 15:44:12,130 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 5062 transitions. Word has length 26 [2020-08-21 15:44:12,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:12,130 INFO L479 AbstractCegarLoop]: Abstraction has 3720 states and 5062 transitions. [2020-08-21 15:44:12,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:12,131 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 5062 transitions. [2020-08-21 15:44:12,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 15:44:12,136 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:12,136 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:12,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 15:44:12,136 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:12,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:12,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1459677136, now seen corresponding path program 1 times [2020-08-21 15:44:12,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:12,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1902417610] [2020-08-21 15:44:12,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:12,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:12,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:12,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:12,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:12,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1902417610] [2020-08-21 15:44:12,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:12,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:12,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361275820] [2020-08-21 15:44:12,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:12,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:12,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:12,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:12,159 INFO L87 Difference]: Start difference. First operand 3720 states and 5062 transitions. Second operand 3 states. [2020-08-21 15:44:12,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:12,248 INFO L93 Difference]: Finished difference Result 5580 states and 7560 transitions. [2020-08-21 15:44:12,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:12,248 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 15:44:12,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:12,268 INFO L225 Difference]: With dead ends: 5580 [2020-08-21 15:44:12,268 INFO L226 Difference]: Without dead ends: 3786 [2020-08-21 15:44:12,272 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 [2020-08-21 15:44:12,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3786 states. [2020-08-21 15:44:12,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 3784. [2020-08-21 15:44:12,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3784 states. [2020-08-21 15:44:12,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 5062 transitions. [2020-08-21 15:44:12,380 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 5062 transitions. Word has length 27 [2020-08-21 15:44:12,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:12,380 INFO L479 AbstractCegarLoop]: Abstraction has 3784 states and 5062 transitions. [2020-08-21 15:44:12,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:12,380 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 5062 transitions. [2020-08-21 15:44:12,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 15:44:12,385 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:12,385 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:12,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 15:44:12,386 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:12,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:12,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1824172910, now seen corresponding path program 1 times [2020-08-21 15:44:12,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:12,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145977503] [2020-08-21 15:44:12,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:12,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:12,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:12,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:12,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:12,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145977503] [2020-08-21 15:44:12,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:12,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:12,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317819431] [2020-08-21 15:44:12,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:12,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:12,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:12,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:12,413 INFO L87 Difference]: Start difference. First operand 3784 states and 5062 transitions. Second operand 3 states. [2020-08-21 15:44:12,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:12,517 INFO L93 Difference]: Finished difference Result 10956 states and 14408 transitions. [2020-08-21 15:44:12,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:12,517 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 15:44:12,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:12,546 INFO L225 Difference]: With dead ends: 10956 [2020-08-21 15:44:12,547 INFO L226 Difference]: Without dead ends: 7306 [2020-08-21 15:44:12,555 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 [2020-08-21 15:44:12,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7306 states. [2020-08-21 15:44:12,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7306 to 7304. [2020-08-21 15:44:12,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-08-21 15:44:12,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9350 transitions. [2020-08-21 15:44:12,786 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9350 transitions. Word has length 27 [2020-08-21 15:44:12,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:12,787 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9350 transitions. [2020-08-21 15:44:12,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:12,787 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9350 transitions. [2020-08-21 15:44:12,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 15:44:12,797 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:12,798 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:12,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 15:44:12,798 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:12,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:12,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1883988372, now seen corresponding path program 1 times [2020-08-21 15:44:12,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:12,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742368379] [2020-08-21 15:44:12,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:12,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:12,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:12,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:12,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:12,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742368379] [2020-08-21 15:44:12,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:12,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:12,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623673282] [2020-08-21 15:44:12,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:12,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:12,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:12,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:12,828 INFO L87 Difference]: Start difference. First operand 7304 states and 9350 transitions. Second operand 3 states. [2020-08-21 15:44:12,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:12,970 INFO L93 Difference]: Finished difference Result 8076 states and 10632 transitions. [2020-08-21 15:44:12,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:12,970 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 15:44:12,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:12,987 INFO L225 Difference]: With dead ends: 8076 [2020-08-21 15:44:12,987 INFO L226 Difference]: Without dead ends: 8074 [2020-08-21 15:44:12,991 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 [2020-08-21 15:44:13,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-21 15:44:13,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 7304. [2020-08-21 15:44:13,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-08-21 15:44:13,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9222 transitions. [2020-08-21 15:44:13,187 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9222 transitions. Word has length 27 [2020-08-21 15:44:13,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:13,188 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9222 transitions. [2020-08-21 15:44:13,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:13,188 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9222 transitions. [2020-08-21 15:44:13,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 15:44:13,197 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:13,197 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:13,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 15:44:13,198 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:13,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:13,198 INFO L82 PathProgramCache]: Analyzing trace with hash 715001129, now seen corresponding path program 1 times [2020-08-21 15:44:13,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:13,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783210345] [2020-08-21 15:44:13,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:13,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:13,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:13,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:13,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:13,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783210345] [2020-08-21 15:44:13,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:13,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:13,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768794421] [2020-08-21 15:44:13,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:13,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:13,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:13,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:13,227 INFO L87 Difference]: Start difference. First operand 7304 states and 9222 transitions. Second operand 3 states. [2020-08-21 15:44:13,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:13,457 INFO L93 Difference]: Finished difference Result 12172 states and 15496 transitions. [2020-08-21 15:44:13,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:13,458 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-21 15:44:13,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:13,481 INFO L225 Difference]: With dead ends: 12172 [2020-08-21 15:44:13,481 INFO L226 Difference]: Without dead ends: 12170 [2020-08-21 15:44:13,484 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 [2020-08-21 15:44:13,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12170 states. [2020-08-21 15:44:13,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12170 to 11144. [2020-08-21 15:44:13,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11144 states. [2020-08-21 15:44:13,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11144 states to 11144 states and 13702 transitions. [2020-08-21 15:44:13,717 INFO L78 Accepts]: Start accepts. Automaton has 11144 states and 13702 transitions. Word has length 28 [2020-08-21 15:44:13,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:13,717 INFO L479 AbstractCegarLoop]: Abstraction has 11144 states and 13702 transitions. [2020-08-21 15:44:13,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:13,718 INFO L276 IsEmpty]: Start isEmpty. Operand 11144 states and 13702 transitions. [2020-08-21 15:44:13,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 15:44:13,735 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:13,735 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:13,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 15:44:13,735 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:13,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:13,736 INFO L82 PathProgramCache]: Analyzing trace with hash 128195115, now seen corresponding path program 1 times [2020-08-21 15:44:13,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:13,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572820480] [2020-08-21 15:44:13,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:13,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:13,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:13,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:13,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:13,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572820480] [2020-08-21 15:44:13,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:13,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:13,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137138029] [2020-08-21 15:44:13,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:13,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:13,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:13,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:13,758 INFO L87 Difference]: Start difference. First operand 11144 states and 13702 transitions. Second operand 3 states. [2020-08-21 15:44:13,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:13,965 INFO L93 Difference]: Finished difference Result 25228 states and 30856 transitions. [2020-08-21 15:44:13,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:13,965 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-21 15:44:13,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:13,993 INFO L225 Difference]: With dead ends: 25228 [2020-08-21 15:44:13,994 INFO L226 Difference]: Without dead ends: 14218 [2020-08-21 15:44:14,089 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 [2020-08-21 15:44:14,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14218 states. [2020-08-21 15:44:14,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14218 to 14216. [2020-08-21 15:44:14,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14216 states. [2020-08-21 15:44:14,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14216 states to 14216 states and 16902 transitions. [2020-08-21 15:44:14,380 INFO L78 Accepts]: Start accepts. Automaton has 14216 states and 16902 transitions. Word has length 28 [2020-08-21 15:44:14,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:14,380 INFO L479 AbstractCegarLoop]: Abstraction has 14216 states and 16902 transitions. [2020-08-21 15:44:14,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:14,381 INFO L276 IsEmpty]: Start isEmpty. Operand 14216 states and 16902 transitions. [2020-08-21 15:44:14,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-21 15:44:14,403 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:14,403 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:14,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-21 15:44:14,404 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:14,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:14,404 INFO L82 PathProgramCache]: Analyzing trace with hash 690414627, now seen corresponding path program 1 times [2020-08-21 15:44:14,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:14,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240421217] [2020-08-21 15:44:14,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:14,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:14,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:14,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:14,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:14,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240421217] [2020-08-21 15:44:14,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:14,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:14,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508657862] [2020-08-21 15:44:14,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:14,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:14,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:14,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:14,466 INFO L87 Difference]: Start difference. First operand 14216 states and 16902 transitions. Second operand 3 states. [2020-08-21 15:44:14,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:14,788 INFO L93 Difference]: Finished difference Result 21516 states and 25608 transitions. [2020-08-21 15:44:14,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:14,789 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-21 15:44:14,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:14,812 INFO L225 Difference]: With dead ends: 21516 [2020-08-21 15:44:14,812 INFO L226 Difference]: Without dead ends: 14602 [2020-08-21 15:44:14,825 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 [2020-08-21 15:44:14,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14602 states. [2020-08-21 15:44:15,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14602 to 14600. [2020-08-21 15:44:15,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14600 states. [2020-08-21 15:44:15,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14600 states to 14600 states and 17158 transitions. [2020-08-21 15:44:15,160 INFO L78 Accepts]: Start accepts. Automaton has 14600 states and 17158 transitions. Word has length 29 [2020-08-21 15:44:15,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:15,161 INFO L479 AbstractCegarLoop]: Abstraction has 14600 states and 17158 transitions. [2020-08-21 15:44:15,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:15,161 INFO L276 IsEmpty]: Start isEmpty. Operand 14600 states and 17158 transitions. [2020-08-21 15:44:15,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-21 15:44:15,178 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:15,178 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:15,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-21 15:44:15,178 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:15,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:15,179 INFO L82 PathProgramCache]: Analyzing trace with hash -320702623, now seen corresponding path program 1 times [2020-08-21 15:44:15,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:15,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521700723] [2020-08-21 15:44:15,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:15,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:15,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:15,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:15,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:15,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521700723] [2020-08-21 15:44:15,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:15,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:15,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302058054] [2020-08-21 15:44:15,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:15,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:15,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:15,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:15,212 INFO L87 Difference]: Start difference. First operand 14600 states and 17158 transitions. Second operand 3 states. [2020-08-21 15:44:15,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:15,907 INFO L93 Difference]: Finished difference Result 23562 states and 27399 transitions. [2020-08-21 15:44:15,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:15,907 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-21 15:44:15,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:15,960 INFO L225 Difference]: With dead ends: 23562 [2020-08-21 15:44:15,961 INFO L226 Difference]: Without dead ends: 23560 [2020-08-21 15:44:15,968 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 [2020-08-21 15:44:15,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23560 states. [2020-08-21 15:44:16,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23560 to 22536. [2020-08-21 15:44:16,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22536 states. [2020-08-21 15:44:16,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22536 states to 22536 states and 25862 transitions. [2020-08-21 15:44:16,411 INFO L78 Accepts]: Start accepts. Automaton has 22536 states and 25862 transitions. Word has length 29 [2020-08-21 15:44:16,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:16,411 INFO L479 AbstractCegarLoop]: Abstraction has 22536 states and 25862 transitions. [2020-08-21 15:44:16,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:16,412 INFO L276 IsEmpty]: Start isEmpty. Operand 22536 states and 25862 transitions. [2020-08-21 15:44:16,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-21 15:44:16,448 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:44:16,448 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:44:16,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-21 15:44:16,448 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:44:16,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:44:16,449 INFO L82 PathProgramCache]: Analyzing trace with hash -907508637, now seen corresponding path program 1 times [2020-08-21 15:44:16,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:44:16,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584535715] [2020-08-21 15:44:16,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:44:16,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:16,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:44:16,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:44:16,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:44:16,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584535715] [2020-08-21 15:44:16,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:44:16,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 15:44:16,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974631172] [2020-08-21 15:44:16,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 15:44:16,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:44:16,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 15:44:16,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 15:44:16,479 INFO L87 Difference]: Start difference. First operand 22536 states and 25862 transitions. Second operand 3 states. [2020-08-21 15:44:16,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:44:16,880 INFO L93 Difference]: Finished difference Result 50184 states and 56582 transitions. [2020-08-21 15:44:16,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 15:44:16,880 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-21 15:44:16,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:44:16,881 INFO L225 Difference]: With dead ends: 50184 [2020-08-21 15:44:16,881 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 15:44:16,939 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 [2020-08-21 15:44:16,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 15:44:16,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 15:44:16,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 15:44:16,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 15:44:16,940 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-08-21 15:44:16,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:44:16,940 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 15:44:16,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 15:44:16,940 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 15:44:16,940 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 15:44:16,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-21 15:44:16,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 15:44:16,971 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 15:44:16,971 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 15:44:16,971 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 15:44:16,971 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 15:44:16,972 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 15:44:16,972 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 15:44:16,972 INFO L271 CegarLoopResult]: At program point L159(lines 5 163) the Hoare annotation is: true [2020-08-21 15:44:16,972 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 163) no Hoare annotation was computed. [2020-08-21 15:44:16,972 INFO L268 CegarLoopResult]: For program point L118-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 15:44:16,972 INFO L268 CegarLoopResult]: For program point L143-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 15:44:16,972 INFO L268 CegarLoopResult]: For program point L102-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 15:44:16,972 INFO L268 CegarLoopResult]: For program point L94-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 15:44:16,973 INFO L268 CegarLoopResult]: For program point L119(line 119) no Hoare annotation was computed. [2020-08-21 15:44:16,974 INFO L268 CegarLoopResult]: For program point L86-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 15:44:16,974 INFO L268 CegarLoopResult]: For program point L144(line 144) no Hoare annotation was computed. [2020-08-21 15:44:16,974 INFO L268 CegarLoopResult]: For program point L78-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 15:44:16,974 INFO L268 CegarLoopResult]: For program point L70-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 15:44:16,974 INFO L268 CegarLoopResult]: For program point L128-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 15:44:16,974 INFO L271 CegarLoopResult]: At program point L153-1(lines 39 158) the Hoare annotation is: true [2020-08-21 15:44:16,974 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 163) no Hoare annotation was computed. [2020-08-21 15:44:16,974 INFO L268 CegarLoopResult]: For program point L129(line 129) no Hoare annotation was computed. [2020-08-21 15:44:16,975 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 161) no Hoare annotation was computed. [2020-08-21 15:44:16,975 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 163) the Hoare annotation is: true [2020-08-21 15:44:16,975 INFO L268 CegarLoopResult]: For program point L154(line 154) no Hoare annotation was computed. [2020-08-21 15:44:16,975 INFO L264 CegarLoopResult]: At program point L154-1(lines 5 163) the Hoare annotation is: false [2020-08-21 15:44:16,975 INFO L268 CegarLoopResult]: For program point L113-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 15:44:16,976 INFO L268 CegarLoopResult]: For program point L138-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 15:44:16,976 INFO L268 CegarLoopResult]: For program point L114(line 114) no Hoare annotation was computed. [2020-08-21 15:44:16,976 INFO L268 CegarLoopResult]: For program point L139(line 139) no Hoare annotation was computed. [2020-08-21 15:44:16,976 INFO L268 CegarLoopResult]: For program point L98-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 15:44:16,976 INFO L268 CegarLoopResult]: For program point L123-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 15:44:16,976 INFO L268 CegarLoopResult]: For program point L90-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 15:44:16,976 INFO L268 CegarLoopResult]: For program point L148-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 15:44:16,976 INFO L268 CegarLoopResult]: For program point L82-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 15:44:16,977 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-08-21 15:44:16,977 INFO L268 CegarLoopResult]: For program point L74-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 15:44:16,977 INFO L268 CegarLoopResult]: For program point L66(lines 66 68) no Hoare annotation was computed. [2020-08-21 15:44:16,977 INFO L268 CegarLoopResult]: For program point L66-2(lines 39 158) no Hoare annotation was computed. [2020-08-21 15:44:16,977 INFO L268 CegarLoopResult]: For program point L124(line 124) no Hoare annotation was computed. [2020-08-21 15:44:16,977 INFO L268 CegarLoopResult]: For program point L149(line 149) no Hoare annotation was computed. [2020-08-21 15:44:16,977 INFO L268 CegarLoopResult]: For program point L108-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 15:44:16,977 INFO L268 CegarLoopResult]: For program point L133-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 15:44:16,978 INFO L268 CegarLoopResult]: For program point L109(line 109) no Hoare annotation was computed. [2020-08-21 15:44:16,978 INFO L268 CegarLoopResult]: For program point L134(line 134) no Hoare annotation was computed. [2020-08-21 15:44:16,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 03:44:16 BoogieIcfgContainer [2020-08-21 15:44:16,999 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 15:44:17,002 INFO L168 Benchmark]: Toolchain (without parser) took 8796.69 ms. Allocated memory was 140.0 MB in the beginning and 628.1 MB in the end (delta: 488.1 MB). Free memory was 102.5 MB in the beginning and 410.7 MB in the end (delta: -308.2 MB). Peak memory consumption was 179.9 MB. Max. memory is 7.1 GB. [2020-08-21 15:44:17,005 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 121.1 MB in the end (delta: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. [2020-08-21 15:44:17,007 INFO L168 Benchmark]: CACSL2BoogieTranslator took 318.71 ms. Allocated memory is still 140.0 MB. Free memory was 102.5 MB in the beginning and 91.6 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-08-21 15:44:17,012 INFO L168 Benchmark]: Boogie Preprocessor took 116.24 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 91.6 MB in the beginning and 179.9 MB in the end (delta: -88.3 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. [2020-08-21 15:44:17,012 INFO L168 Benchmark]: RCFGBuilder took 404.02 ms. Allocated memory is still 202.4 MB. Free memory was 179.9 MB in the beginning and 160.1 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. [2020-08-21 15:44:17,015 INFO L168 Benchmark]: TraceAbstraction took 7942.06 ms. Allocated memory was 202.4 MB in the beginning and 628.1 MB in the end (delta: 425.7 MB). Free memory was 160.1 MB in the beginning and 410.7 MB in the end (delta: -250.6 MB). Peak memory consumption was 175.1 MB. Max. memory is 7.1 GB. [2020-08-21 15:44:17,018 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 121.1 MB in the end (delta: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 318.71 ms. Allocated memory is still 140.0 MB. Free memory was 102.5 MB in the beginning and 91.6 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.24 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 91.6 MB in the beginning and 179.9 MB in the end (delta: -88.3 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 404.02 ms. Allocated memory is still 202.4 MB. Free memory was 179.9 MB in the beginning and 160.1 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7942.06 ms. Allocated memory was 202.4 MB in the beginning and 628.1 MB in the end (delta: 425.7 MB). Free memory was 160.1 MB in the beginning and 410.7 MB in the end (delta: -250.6 MB). Peak memory consumption was 175.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 161]: 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: 39]: 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, 44 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.8s, OverallIterations: 28, TraceHistogramMax: 1, AutomataDifference: 3.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2384 SDtfs, 1153 SDslu, 1624 SDs, 0 SdLazy, 149 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 140 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22536occurred in iteration=27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.5s AutomataMinimizationTime, 28 MinimizatonAttempts, 4124 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 1034 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, 0.7s InterpolantComputationTime, 687 NumberOfCodeBlocks, 687 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 659 ConstructedInterpolants, 0 QuantifiedInterpolants, 31265 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 28 InterpolantComputations, 28 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...