/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=NARROWEST --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 21:22:34,169 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-21 21:22:34,196 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 21:22:34,197 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 21:22:34,199 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 21:22:34,201 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 21:22:34,202 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 21:22:34,203 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 21:22:34,204 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 21:22:34,205 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 21:22:34,206 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 21:22:34,207 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 21:22:34,208 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 21:22:34,212 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 21:22:34,213 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 21:22:34,214 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 21:22:34,216 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 21:22:34,218 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 21:22:34,224 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 21:22:34,227 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 21:22:34,229 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 21:22:34,230 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 21:22:34,233 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 21:22:34,252 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 21:22:34,253 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 21:22:34,255 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 21:22:34,255 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 21:22:34,299 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 21:22:34,300 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 21:22:34,303 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 21:22:34,303 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 21:22:34,303 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 21:22:34,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 21:22:34,303 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 21:22:34,304 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 21:22:34,304 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 21:22:34,304 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 21:22:34,305 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 21:22:34,305 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 21:22:34,306 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 21:22:34,306 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 21:22:34,306 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 21:22:34,306 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 21:22:34,307 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 21:22:34,307 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 21:22:34,307 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 21:22:34,307 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 21:22:34,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 21:22:34,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 21:22:34,308 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 21:22:34,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 21:22:34,308 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 21:22:34,309 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 21:22:34,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 21:22:34,309 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 21:22:34,309 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 21:22:34,309 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=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; [2020-08-21 21:22:34,585 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 21:22:34,608 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 21:22:34,614 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 21:22:34,616 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 21:22:34,616 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 21:22:34,617 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_10.c [2020-08-21 21:22:34,683 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f46251a21/3a80b4d7a0354d4291f8e7084a75bfb6/FLAG2753c9348 [2020-08-21 21:22:35,166 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 21:22:35,167 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_10.c [2020-08-21 21:22:35,181 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f46251a21/3a80b4d7a0354d4291f8e7084a75bfb6/FLAG2753c9348 [2020-08-21 21:22:35,530 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f46251a21/3a80b4d7a0354d4291f8e7084a75bfb6 [2020-08-21 21:22:35,545 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 21:22:35,547 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 21:22:35,548 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 21:22:35,548 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 21:22:35,552 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 21:22:35,553 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:22:35" (1/1) ... [2020-08-21 21:22:35,556 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6317371b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:35, skipping insertion in model container [2020-08-21 21:22:35,557 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:22:35" (1/1) ... [2020-08-21 21:22:35,565 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 21:22:35,590 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 21:22:35,869 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:22:35,877 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 21:22:36,018 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:22:36,042 INFO L208 MainTranslator]: Completed translation [2020-08-21 21:22:36,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:36 WrapperNode [2020-08-21 21:22:36,044 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 21:22:36,045 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 21:22:36,046 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 21:22:36,046 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 21:22:36,062 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:36" (1/1) ... [2020-08-21 21:22:36,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:36" (1/1) ... [2020-08-21 21:22:36,071 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:36" (1/1) ... [2020-08-21 21:22:36,072 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:36" (1/1) ... [2020-08-21 21:22:36,083 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:36" (1/1) ... [2020-08-21 21:22:36,099 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:36" (1/1) ... [2020-08-21 21:22:36,107 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:36" (1/1) ... [2020-08-21 21:22:36,111 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 21:22:36,112 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 21:22:36,112 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 21:22:36,112 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 21:22:36,115 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:36" (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 21:22:36,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 21:22:36,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 21:22:36,182 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 21:22:36,182 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 21:22:36,182 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 21:22:36,183 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 21:22:36,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 21:22:36,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 21:22:36,517 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 21:22:36,518 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 21:22:36,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:22:36 BoogieIcfgContainer [2020-08-21 21:22:36,523 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 21:22:36,524 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 21:22:36,524 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 21:22:36,527 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 21:22:36,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 09:22:35" (1/3) ... [2020-08-21 21:22:36,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68cb0d43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:22:36, skipping insertion in model container [2020-08-21 21:22:36,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:22:36" (2/3) ... [2020-08-21 21:22:36,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68cb0d43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:22:36, skipping insertion in model container [2020-08-21 21:22:36,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:22:36" (3/3) ... [2020-08-21 21:22:36,532 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_10.c [2020-08-21 21:22:36,545 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 21:22:36,556 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 21:22:36,581 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 21:22:36,622 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 21:22:36,622 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 21:22:36,622 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 21:22:36,622 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 21:22:36,623 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 21:22:36,623 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 21:22:36,623 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 21:22:36,624 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 21:22:36,645 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-08-21 21:22:36,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 21:22:36,652 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:36,653 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 21:22:36,653 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:36,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:36,666 INFO L82 PathProgramCache]: Analyzing trace with hash -917347053, now seen corresponding path program 1 times [2020-08-21 21:22:36,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:36,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518192872] [2020-08-21 21:22:36,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:36,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:36,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:36,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:36,874 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 21:22:36,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518192872] [2020-08-21 21:22:36,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:36,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:36,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325361762] [2020-08-21 21:22:36,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:36,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:36,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:36,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:36,901 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-08-21 21:22:36,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:36,972 INFO L93 Difference]: Finished difference Result 87 states and 150 transitions. [2020-08-21 21:22:36,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:36,975 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 21:22:36,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:36,986 INFO L225 Difference]: With dead ends: 87 [2020-08-21 21:22:36,986 INFO L226 Difference]: Without dead ends: 72 [2020-08-21 21:22:36,990 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 21:22:37,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-21 21:22:37,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-08-21 21:22:37,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-21 21:22:37,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 89 transitions. [2020-08-21 21:22:37,042 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 89 transitions. Word has length 20 [2020-08-21 21:22:37,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:37,043 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 89 transitions. [2020-08-21 21:22:37,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:37,043 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 89 transitions. [2020-08-21 21:22:37,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 21:22:37,044 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:37,044 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 21:22:37,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 21:22:37,045 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:37,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:37,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1504153067, now seen corresponding path program 1 times [2020-08-21 21:22:37,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:37,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554315909] [2020-08-21 21:22:37,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:37,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:37,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:37,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:37,128 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 21:22:37,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554315909] [2020-08-21 21:22:37,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:37,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:37,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065602759] [2020-08-21 21:22:37,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:37,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:37,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:37,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:37,132 INFO L87 Difference]: Start difference. First operand 50 states and 89 transitions. Second operand 3 states. [2020-08-21 21:22:37,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:37,160 INFO L93 Difference]: Finished difference Result 117 states and 212 transitions. [2020-08-21 21:22:37,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:37,161 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 21:22:37,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:37,163 INFO L225 Difference]: With dead ends: 117 [2020-08-21 21:22:37,163 INFO L226 Difference]: Without dead ends: 72 [2020-08-21 21:22:37,165 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 21:22:37,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-21 21:22:37,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-08-21 21:22:37,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-21 21:22:37,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 125 transitions. [2020-08-21 21:22:37,177 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 125 transitions. Word has length 20 [2020-08-21 21:22:37,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:37,177 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 125 transitions. [2020-08-21 21:22:37,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:37,178 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 125 transitions. [2020-08-21 21:22:37,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 21:22:37,179 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:37,179 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 21:22:37,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 21:22:37,180 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:37,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:37,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1627225809, now seen corresponding path program 1 times [2020-08-21 21:22:37,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:37,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143016489] [2020-08-21 21:22:37,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:37,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:37,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:37,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:37,246 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 21:22:37,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143016489] [2020-08-21 21:22:37,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:37,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:37,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687478236] [2020-08-21 21:22:37,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:37,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:37,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:37,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:37,253 INFO L87 Difference]: Start difference. First operand 70 states and 125 transitions. Second operand 3 states. [2020-08-21 21:22:37,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:37,300 INFO L93 Difference]: Finished difference Result 108 states and 189 transitions. [2020-08-21 21:22:37,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:37,301 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 21:22:37,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:37,302 INFO L225 Difference]: With dead ends: 108 [2020-08-21 21:22:37,303 INFO L226 Difference]: Without dead ends: 75 [2020-08-21 21:22:37,303 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 21:22:37,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-21 21:22:37,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-08-21 21:22:37,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-21 21:22:37,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 127 transitions. [2020-08-21 21:22:37,314 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 127 transitions. Word has length 21 [2020-08-21 21:22:37,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:37,315 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 127 transitions. [2020-08-21 21:22:37,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:37,315 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 127 transitions. [2020-08-21 21:22:37,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 21:22:37,316 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:37,316 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 21:22:37,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 21:22:37,317 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:37,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:37,317 INFO L82 PathProgramCache]: Analyzing trace with hash 616108559, now seen corresponding path program 1 times [2020-08-21 21:22:37,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:37,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719786369] [2020-08-21 21:22:37,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:37,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:37,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:37,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:37,365 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 21:22:37,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719786369] [2020-08-21 21:22:37,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:37,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:37,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230586486] [2020-08-21 21:22:37,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:37,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:37,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:37,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:37,367 INFO L87 Difference]: Start difference. First operand 73 states and 127 transitions. Second operand 3 states. [2020-08-21 21:22:37,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:37,391 INFO L93 Difference]: Finished difference Result 136 states and 240 transitions. [2020-08-21 21:22:37,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:37,392 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 21:22:37,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:37,394 INFO L225 Difference]: With dead ends: 136 [2020-08-21 21:22:37,395 INFO L226 Difference]: Without dead ends: 134 [2020-08-21 21:22:37,395 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 21:22:37,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-08-21 21:22:37,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 96. [2020-08-21 21:22:37,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-21 21:22:37,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 168 transitions. [2020-08-21 21:22:37,408 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 168 transitions. Word has length 21 [2020-08-21 21:22:37,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:37,409 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 168 transitions. [2020-08-21 21:22:37,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:37,409 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 168 transitions. [2020-08-21 21:22:37,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 21:22:37,411 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:37,411 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 21:22:37,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 21:22:37,411 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:37,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:37,412 INFO L82 PathProgramCache]: Analyzing trace with hash 29302545, now seen corresponding path program 1 times [2020-08-21 21:22:37,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:37,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871048392] [2020-08-21 21:22:37,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:37,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:37,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:37,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:37,456 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 21:22:37,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871048392] [2020-08-21 21:22:37,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:37,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:37,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056965422] [2020-08-21 21:22:37,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:37,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:37,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:37,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:37,459 INFO L87 Difference]: Start difference. First operand 96 states and 168 transitions. Second operand 3 states. [2020-08-21 21:22:37,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:37,483 INFO L93 Difference]: Finished difference Result 224 states and 398 transitions. [2020-08-21 21:22:37,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:37,484 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 21:22:37,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:37,486 INFO L225 Difference]: With dead ends: 224 [2020-08-21 21:22:37,486 INFO L226 Difference]: Without dead ends: 136 [2020-08-21 21:22:37,488 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 21:22:37,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-21 21:22:37,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-08-21 21:22:37,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-08-21 21:22:37,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 234 transitions. [2020-08-21 21:22:37,502 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 234 transitions. Word has length 21 [2020-08-21 21:22:37,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:37,503 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 234 transitions. [2020-08-21 21:22:37,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:37,503 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 234 transitions. [2020-08-21 21:22:37,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 21:22:37,505 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:37,505 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 21:22:37,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 21:22:37,505 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:37,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:37,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1919709866, now seen corresponding path program 1 times [2020-08-21 21:22:37,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:37,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540620783] [2020-08-21 21:22:37,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:37,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:37,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:37,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:37,551 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 21:22:37,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540620783] [2020-08-21 21:22:37,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:37,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:37,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280204882] [2020-08-21 21:22:37,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:37,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:37,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:37,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:37,554 INFO L87 Difference]: Start difference. First operand 134 states and 234 transitions. Second operand 3 states. [2020-08-21 21:22:37,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:37,574 INFO L93 Difference]: Finished difference Result 201 states and 349 transitions. [2020-08-21 21:22:37,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:37,575 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 21:22:37,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:37,577 INFO L225 Difference]: With dead ends: 201 [2020-08-21 21:22:37,578 INFO L226 Difference]: Without dead ends: 138 [2020-08-21 21:22:37,579 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 21:22:37,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-21 21:22:37,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-08-21 21:22:37,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-21 21:22:37,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 234 transitions. [2020-08-21 21:22:37,593 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 234 transitions. Word has length 22 [2020-08-21 21:22:37,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:37,594 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 234 transitions. [2020-08-21 21:22:37,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:37,594 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 234 transitions. [2020-08-21 21:22:37,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 21:22:37,595 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:37,595 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 21:22:37,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 21:22:37,596 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:37,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:37,597 INFO L82 PathProgramCache]: Analyzing trace with hash 908592616, now seen corresponding path program 1 times [2020-08-21 21:22:37,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:37,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382855802] [2020-08-21 21:22:37,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:37,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:37,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:37,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:37,669 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 21:22:37,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382855802] [2020-08-21 21:22:37,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:37,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:37,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683828967] [2020-08-21 21:22:37,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:37,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:37,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:37,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:37,672 INFO L87 Difference]: Start difference. First operand 136 states and 234 transitions. Second operand 3 states. [2020-08-21 21:22:37,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:37,700 INFO L93 Difference]: Finished difference Result 252 states and 440 transitions. [2020-08-21 21:22:37,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:37,701 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 21:22:37,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:37,703 INFO L225 Difference]: With dead ends: 252 [2020-08-21 21:22:37,704 INFO L226 Difference]: Without dead ends: 250 [2020-08-21 21:22:37,704 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 21:22:37,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-21 21:22:37,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 184. [2020-08-21 21:22:37,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-08-21 21:22:37,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 314 transitions. [2020-08-21 21:22:37,726 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 314 transitions. Word has length 22 [2020-08-21 21:22:37,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:37,730 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 314 transitions. [2020-08-21 21:22:37,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:37,730 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 314 transitions. [2020-08-21 21:22:37,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 21:22:37,732 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:37,732 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 21:22:37,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 21:22:37,733 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:37,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:37,734 INFO L82 PathProgramCache]: Analyzing trace with hash 321786602, now seen corresponding path program 1 times [2020-08-21 21:22:37,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:37,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879218333] [2020-08-21 21:22:37,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:37,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:37,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:37,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:37,802 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 21:22:37,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879218333] [2020-08-21 21:22:37,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:37,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:37,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948423819] [2020-08-21 21:22:37,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:37,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:37,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:37,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:37,805 INFO L87 Difference]: Start difference. First operand 184 states and 314 transitions. Second operand 3 states. [2020-08-21 21:22:37,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:37,849 INFO L93 Difference]: Finished difference Result 432 states and 744 transitions. [2020-08-21 21:22:37,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:37,850 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 21:22:37,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:37,852 INFO L225 Difference]: With dead ends: 432 [2020-08-21 21:22:37,852 INFO L226 Difference]: Without dead ends: 258 [2020-08-21 21:22:37,854 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 21:22:37,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-08-21 21:22:37,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-08-21 21:22:37,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-21 21:22:37,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 434 transitions. [2020-08-21 21:22:37,871 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 434 transitions. Word has length 22 [2020-08-21 21:22:37,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:37,871 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 434 transitions. [2020-08-21 21:22:37,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:37,871 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 434 transitions. [2020-08-21 21:22:37,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 21:22:37,873 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:37,873 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 21:22:37,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 21:22:37,874 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:37,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:37,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1898185914, now seen corresponding path program 1 times [2020-08-21 21:22:37,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:37,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309782548] [2020-08-21 21:22:37,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:37,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:37,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:37,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:37,921 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 21:22:37,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309782548] [2020-08-21 21:22:37,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:37,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:37,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263571926] [2020-08-21 21:22:37,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:37,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:37,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:37,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:37,926 INFO L87 Difference]: Start difference. First operand 256 states and 434 transitions. Second operand 3 states. [2020-08-21 21:22:37,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:37,955 INFO L93 Difference]: Finished difference Result 384 states and 648 transitions. [2020-08-21 21:22:37,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:37,956 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 21:22:37,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:37,959 INFO L225 Difference]: With dead ends: 384 [2020-08-21 21:22:37,959 INFO L226 Difference]: Without dead ends: 262 [2020-08-21 21:22:37,960 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 21:22:37,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-08-21 21:22:37,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2020-08-21 21:22:37,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-08-21 21:22:37,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 434 transitions. [2020-08-21 21:22:37,986 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 434 transitions. Word has length 23 [2020-08-21 21:22:37,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:37,986 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 434 transitions. [2020-08-21 21:22:37,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:37,987 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 434 transitions. [2020-08-21 21:22:37,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 21:22:37,995 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:37,995 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 21:22:37,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 21:22:37,996 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:37,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:37,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1385664132, now seen corresponding path program 1 times [2020-08-21 21:22:37,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:37,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420935] [2020-08-21 21:22:37,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:38,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:38,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:38,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:38,038 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 21:22:38,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420935] [2020-08-21 21:22:38,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:38,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:38,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603258765] [2020-08-21 21:22:38,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:38,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:38,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:38,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:38,040 INFO L87 Difference]: Start difference. First operand 260 states and 434 transitions. Second operand 3 states. [2020-08-21 21:22:38,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:38,063 INFO L93 Difference]: Finished difference Result 476 states and 808 transitions. [2020-08-21 21:22:38,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:38,064 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 21:22:38,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:38,067 INFO L225 Difference]: With dead ends: 476 [2020-08-21 21:22:38,067 INFO L226 Difference]: Without dead ends: 474 [2020-08-21 21:22:38,068 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 21:22:38,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-08-21 21:22:38,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 360. [2020-08-21 21:22:38,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-08-21 21:22:38,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 590 transitions. [2020-08-21 21:22:38,083 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 590 transitions. Word has length 23 [2020-08-21 21:22:38,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:38,083 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 590 transitions. [2020-08-21 21:22:38,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:38,083 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 590 transitions. [2020-08-21 21:22:38,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 21:22:38,085 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:38,085 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 21:22:38,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 21:22:38,086 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:38,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:38,086 INFO L82 PathProgramCache]: Analyzing trace with hash 798858118, now seen corresponding path program 1 times [2020-08-21 21:22:38,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:38,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474416400] [2020-08-21 21:22:38,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:38,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:38,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:38,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:38,111 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 21:22:38,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474416400] [2020-08-21 21:22:38,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:38,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:38,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106158605] [2020-08-21 21:22:38,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:38,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:38,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:38,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:38,114 INFO L87 Difference]: Start difference. First operand 360 states and 590 transitions. Second operand 3 states. [2020-08-21 21:22:38,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:38,138 INFO L93 Difference]: Finished difference Result 844 states and 1392 transitions. [2020-08-21 21:22:38,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:38,139 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 21:22:38,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:38,142 INFO L225 Difference]: With dead ends: 844 [2020-08-21 21:22:38,142 INFO L226 Difference]: Without dead ends: 498 [2020-08-21 21:22:38,143 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 21:22:38,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-08-21 21:22:38,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 496. [2020-08-21 21:22:38,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2020-08-21 21:22:38,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 806 transitions. [2020-08-21 21:22:38,161 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 806 transitions. Word has length 23 [2020-08-21 21:22:38,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:38,161 INFO L479 AbstractCegarLoop]: Abstraction has 496 states and 806 transitions. [2020-08-21 21:22:38,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:38,161 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 806 transitions. [2020-08-21 21:22:38,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 21:22:38,163 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:38,163 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 21:22:38,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 21:22:38,163 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:38,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:38,164 INFO L82 PathProgramCache]: Analyzing trace with hash 6129535, now seen corresponding path program 1 times [2020-08-21 21:22:38,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:38,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284317709] [2020-08-21 21:22:38,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:38,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:38,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:38,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:38,188 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 21:22:38,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284317709] [2020-08-21 21:22:38,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:38,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:38,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596437322] [2020-08-21 21:22:38,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:38,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:38,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:38,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:38,191 INFO L87 Difference]: Start difference. First operand 496 states and 806 transitions. Second operand 3 states. [2020-08-21 21:22:38,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:38,220 INFO L93 Difference]: Finished difference Result 744 states and 1204 transitions. [2020-08-21 21:22:38,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:38,221 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 21:22:38,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:38,225 INFO L225 Difference]: With dead ends: 744 [2020-08-21 21:22:38,225 INFO L226 Difference]: Without dead ends: 506 [2020-08-21 21:22:38,227 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 21:22:38,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-08-21 21:22:38,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 504. [2020-08-21 21:22:38,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-08-21 21:22:38,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 806 transitions. [2020-08-21 21:22:38,244 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 806 transitions. Word has length 24 [2020-08-21 21:22:38,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:38,245 INFO L479 AbstractCegarLoop]: Abstraction has 504 states and 806 transitions. [2020-08-21 21:22:38,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:38,245 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 806 transitions. [2020-08-21 21:22:38,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 21:22:38,246 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:38,247 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 21:22:38,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 21:22:38,248 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:38,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:38,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1004987715, now seen corresponding path program 1 times [2020-08-21 21:22:38,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:38,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138142557] [2020-08-21 21:22:38,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:38,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:38,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:38,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:38,281 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 21:22:38,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138142557] [2020-08-21 21:22:38,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:38,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:38,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011695100] [2020-08-21 21:22:38,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:38,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:38,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:38,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:38,286 INFO L87 Difference]: Start difference. First operand 504 states and 806 transitions. Second operand 3 states. [2020-08-21 21:22:38,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:38,312 INFO L93 Difference]: Finished difference Result 908 states and 1480 transitions. [2020-08-21 21:22:38,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:38,312 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 21:22:38,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:38,317 INFO L225 Difference]: With dead ends: 908 [2020-08-21 21:22:38,318 INFO L226 Difference]: Without dead ends: 906 [2020-08-21 21:22:38,318 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 21:22:38,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2020-08-21 21:22:38,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 712. [2020-08-21 21:22:38,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-08-21 21:22:38,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1110 transitions. [2020-08-21 21:22:38,341 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1110 transitions. Word has length 24 [2020-08-21 21:22:38,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:38,342 INFO L479 AbstractCegarLoop]: Abstraction has 712 states and 1110 transitions. [2020-08-21 21:22:38,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:38,342 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1110 transitions. [2020-08-21 21:22:38,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 21:22:38,343 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:38,343 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 21:22:38,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 21:22:38,344 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:38,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:38,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1591793729, now seen corresponding path program 1 times [2020-08-21 21:22:38,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:38,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558756025] [2020-08-21 21:22:38,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:38,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:38,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:38,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:38,375 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 21:22:38,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558756025] [2020-08-21 21:22:38,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:38,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:38,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007268742] [2020-08-21 21:22:38,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:38,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:38,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:38,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:38,377 INFO L87 Difference]: Start difference. First operand 712 states and 1110 transitions. Second operand 3 states. [2020-08-21 21:22:38,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:38,413 INFO L93 Difference]: Finished difference Result 1660 states and 2600 transitions. [2020-08-21 21:22:38,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:38,414 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 21:22:38,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:38,420 INFO L225 Difference]: With dead ends: 1660 [2020-08-21 21:22:38,420 INFO L226 Difference]: Without dead ends: 970 [2020-08-21 21:22:38,422 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 21:22:38,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-08-21 21:22:38,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 968. [2020-08-21 21:22:38,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 968 states. [2020-08-21 21:22:38,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1494 transitions. [2020-08-21 21:22:38,458 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1494 transitions. Word has length 24 [2020-08-21 21:22:38,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:38,458 INFO L479 AbstractCegarLoop]: Abstraction has 968 states and 1494 transitions. [2020-08-21 21:22:38,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:38,459 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1494 transitions. [2020-08-21 21:22:38,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 21:22:38,460 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:38,461 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] [2020-08-21 21:22:38,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 21:22:38,461 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:38,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:38,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1089633349, now seen corresponding path program 1 times [2020-08-21 21:22:38,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:38,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080340468] [2020-08-21 21:22:38,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:38,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:38,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:38,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:38,486 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 21:22:38,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080340468] [2020-08-21 21:22:38,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:38,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:38,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970291432] [2020-08-21 21:22:38,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:38,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:38,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:38,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:38,489 INFO L87 Difference]: Start difference. First operand 968 states and 1494 transitions. Second operand 3 states. [2020-08-21 21:22:38,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:38,519 INFO L93 Difference]: Finished difference Result 1452 states and 2232 transitions. [2020-08-21 21:22:38,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:38,520 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 21:22:38,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:38,525 INFO L225 Difference]: With dead ends: 1452 [2020-08-21 21:22:38,526 INFO L226 Difference]: Without dead ends: 986 [2020-08-21 21:22:38,527 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 21:22:38,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2020-08-21 21:22:38,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 984. [2020-08-21 21:22:38,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 984 states. [2020-08-21 21:22:38,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1494 transitions. [2020-08-21 21:22:38,578 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1494 transitions. Word has length 25 [2020-08-21 21:22:38,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:38,579 INFO L479 AbstractCegarLoop]: Abstraction has 984 states and 1494 transitions. [2020-08-21 21:22:38,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:38,579 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1494 transitions. [2020-08-21 21:22:38,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 21:22:38,581 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:38,581 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 21:22:38,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 21:22:38,581 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:38,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:38,582 INFO L82 PathProgramCache]: Analyzing trace with hash -2100750599, now seen corresponding path program 1 times [2020-08-21 21:22:38,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:38,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807767512] [2020-08-21 21:22:38,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:38,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:38,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:38,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:38,604 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 21:22:38,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807767512] [2020-08-21 21:22:38,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:38,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:38,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761552785] [2020-08-21 21:22:38,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:38,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:38,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:38,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:38,606 INFO L87 Difference]: Start difference. First operand 984 states and 1494 transitions. Second operand 3 states. [2020-08-21 21:22:38,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:38,638 INFO L93 Difference]: Finished difference Result 1740 states and 2696 transitions. [2020-08-21 21:22:38,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:38,639 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 21:22:38,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:38,647 INFO L225 Difference]: With dead ends: 1740 [2020-08-21 21:22:38,648 INFO L226 Difference]: Without dead ends: 1738 [2020-08-21 21:22:38,649 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 21:22:38,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-08-21 21:22:38,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1416. [2020-08-21 21:22:38,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1416 states. [2020-08-21 21:22:38,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2086 transitions. [2020-08-21 21:22:38,692 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2086 transitions. Word has length 25 [2020-08-21 21:22:38,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:38,692 INFO L479 AbstractCegarLoop]: Abstraction has 1416 states and 2086 transitions. [2020-08-21 21:22:38,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:38,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2086 transitions. [2020-08-21 21:22:38,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 21:22:38,695 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:38,695 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 21:22:38,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 21:22:38,696 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:38,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:38,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1607410683, now seen corresponding path program 1 times [2020-08-21 21:22:38,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:38,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1220035432] [2020-08-21 21:22:38,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:38,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:38,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:38,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:38,719 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 21:22:38,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1220035432] [2020-08-21 21:22:38,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:38,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:38,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121909240] [2020-08-21 21:22:38,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:38,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:38,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:38,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:38,723 INFO L87 Difference]: Start difference. First operand 1416 states and 2086 transitions. Second operand 3 states. [2020-08-21 21:22:38,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:38,770 INFO L93 Difference]: Finished difference Result 3276 states and 4840 transitions. [2020-08-21 21:22:38,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:38,771 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 21:22:38,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:38,780 INFO L225 Difference]: With dead ends: 3276 [2020-08-21 21:22:38,780 INFO L226 Difference]: Without dead ends: 1898 [2020-08-21 21:22:38,783 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 21:22:38,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2020-08-21 21:22:38,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1896. [2020-08-21 21:22:38,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1896 states. [2020-08-21 21:22:38,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2758 transitions. [2020-08-21 21:22:38,843 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2758 transitions. Word has length 25 [2020-08-21 21:22:38,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:38,843 INFO L479 AbstractCegarLoop]: Abstraction has 1896 states and 2758 transitions. [2020-08-21 21:22:38,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:38,843 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2758 transitions. [2020-08-21 21:22:38,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 21:22:38,846 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:38,846 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 21:22:38,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 21:22:38,847 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:38,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:38,847 INFO L82 PathProgramCache]: Analyzing trace with hash -698544044, now seen corresponding path program 1 times [2020-08-21 21:22:38,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:38,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900407557] [2020-08-21 21:22:38,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:38,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:38,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:38,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:38,873 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 21:22:38,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900407557] [2020-08-21 21:22:38,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:38,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:38,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786951678] [2020-08-21 21:22:38,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:38,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:38,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:38,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:38,875 INFO L87 Difference]: Start difference. First operand 1896 states and 2758 transitions. Second operand 3 states. [2020-08-21 21:22:38,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:38,922 INFO L93 Difference]: Finished difference Result 2844 states and 4120 transitions. [2020-08-21 21:22:38,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:38,923 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 21:22:38,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:38,932 INFO L225 Difference]: With dead ends: 2844 [2020-08-21 21:22:38,932 INFO L226 Difference]: Without dead ends: 1930 [2020-08-21 21:22:38,935 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 21:22:38,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-21 21:22:38,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1928. [2020-08-21 21:22:38,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1928 states. [2020-08-21 21:22:38,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 2758 transitions. [2020-08-21 21:22:38,992 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 2758 transitions. Word has length 26 [2020-08-21 21:22:38,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:38,992 INFO L479 AbstractCegarLoop]: Abstraction has 1928 states and 2758 transitions. [2020-08-21 21:22:38,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:38,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 2758 transitions. [2020-08-21 21:22:38,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 21:22:38,995 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:38,995 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 21:22:38,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 21:22:38,995 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:38,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:38,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1709661294, now seen corresponding path program 1 times [2020-08-21 21:22:38,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:38,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1041338037] [2020-08-21 21:22:38,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:39,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:39,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:39,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:39,018 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 21:22:39,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1041338037] [2020-08-21 21:22:39,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:39,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:39,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198726952] [2020-08-21 21:22:39,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:39,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:39,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:39,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:39,023 INFO L87 Difference]: Start difference. First operand 1928 states and 2758 transitions. Second operand 3 states. [2020-08-21 21:22:39,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:39,128 INFO L93 Difference]: Finished difference Result 3340 states and 4872 transitions. [2020-08-21 21:22:39,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:39,128 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 21:22:39,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:39,148 INFO L225 Difference]: With dead ends: 3340 [2020-08-21 21:22:39,148 INFO L226 Difference]: Without dead ends: 3338 [2020-08-21 21:22:39,149 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 21:22:39,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-08-21 21:22:39,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 2824. [2020-08-21 21:22:39,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2824 states. [2020-08-21 21:22:39,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 3910 transitions. [2020-08-21 21:22:39,262 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 3910 transitions. Word has length 26 [2020-08-21 21:22:39,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:39,263 INFO L479 AbstractCegarLoop]: Abstraction has 2824 states and 3910 transitions. [2020-08-21 21:22:39,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:39,263 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 3910 transitions. [2020-08-21 21:22:39,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 21:22:39,273 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:39,273 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 21:22:39,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 21:22:39,274 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:39,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:39,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1998499988, now seen corresponding path program 1 times [2020-08-21 21:22:39,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:39,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534750440] [2020-08-21 21:22:39,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:39,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:39,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:39,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:39,311 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 21:22:39,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534750440] [2020-08-21 21:22:39,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:39,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:39,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695539165] [2020-08-21 21:22:39,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:39,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:39,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:39,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:39,314 INFO L87 Difference]: Start difference. First operand 2824 states and 3910 transitions. Second operand 3 states. [2020-08-21 21:22:39,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:39,411 INFO L93 Difference]: Finished difference Result 6476 states and 8968 transitions. [2020-08-21 21:22:39,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:39,412 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 21:22:39,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:39,433 INFO L225 Difference]: With dead ends: 6476 [2020-08-21 21:22:39,433 INFO L226 Difference]: Without dead ends: 3722 [2020-08-21 21:22:39,440 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 21:22:39,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-21 21:22:39,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3720. [2020-08-21 21:22:39,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3720 states. [2020-08-21 21:22:39,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 5062 transitions. [2020-08-21 21:22:39,553 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 5062 transitions. Word has length 26 [2020-08-21 21:22:39,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:39,553 INFO L479 AbstractCegarLoop]: Abstraction has 3720 states and 5062 transitions. [2020-08-21 21:22:39,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:39,554 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 5062 transitions. [2020-08-21 21:22:39,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 21:22:39,558 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:39,559 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 21:22:39,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 21:22:39,561 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:39,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:39,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1459677136, now seen corresponding path program 1 times [2020-08-21 21:22:39,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:39,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561316931] [2020-08-21 21:22:39,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:39,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:39,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:39,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:39,590 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 21:22:39,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561316931] [2020-08-21 21:22:39,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:39,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:39,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347254415] [2020-08-21 21:22:39,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:39,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:39,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:39,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:39,593 INFO L87 Difference]: Start difference. First operand 3720 states and 5062 transitions. Second operand 3 states. [2020-08-21 21:22:39,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:39,665 INFO L93 Difference]: Finished difference Result 5580 states and 7560 transitions. [2020-08-21 21:22:39,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:39,666 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 21:22:39,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:39,683 INFO L225 Difference]: With dead ends: 5580 [2020-08-21 21:22:39,684 INFO L226 Difference]: Without dead ends: 3786 [2020-08-21 21:22:39,688 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 21:22:39,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3786 states. [2020-08-21 21:22:39,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 3784. [2020-08-21 21:22:39,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3784 states. [2020-08-21 21:22:39,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 5062 transitions. [2020-08-21 21:22:39,833 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 5062 transitions. Word has length 27 [2020-08-21 21:22:39,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:39,833 INFO L479 AbstractCegarLoop]: Abstraction has 3784 states and 5062 transitions. [2020-08-21 21:22:39,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:39,833 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 5062 transitions. [2020-08-21 21:22:39,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 21:22:39,838 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:39,838 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 21:22:39,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 21:22:39,839 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:39,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:39,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1824172910, now seen corresponding path program 1 times [2020-08-21 21:22:39,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:39,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985292872] [2020-08-21 21:22:39,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:39,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:39,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:39,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:39,871 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 21:22:39,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985292872] [2020-08-21 21:22:39,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:39,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:39,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664570678] [2020-08-21 21:22:39,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:39,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:39,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:39,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:39,873 INFO L87 Difference]: Start difference. First operand 3784 states and 5062 transitions. Second operand 3 states. [2020-08-21 21:22:40,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:40,004 INFO L93 Difference]: Finished difference Result 10956 states and 14408 transitions. [2020-08-21 21:22:40,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:40,005 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 21:22:40,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:40,060 INFO L225 Difference]: With dead ends: 10956 [2020-08-21 21:22:40,061 INFO L226 Difference]: Without dead ends: 7306 [2020-08-21 21:22:40,073 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 21:22:40,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7306 states. [2020-08-21 21:22:40,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7306 to 7304. [2020-08-21 21:22:40,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-08-21 21:22:40,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9350 transitions. [2020-08-21 21:22:40,302 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9350 transitions. Word has length 27 [2020-08-21 21:22:40,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:40,302 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9350 transitions. [2020-08-21 21:22:40,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:40,303 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9350 transitions. [2020-08-21 21:22:40,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 21:22:40,313 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:40,313 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 21:22:40,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 21:22:40,313 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:40,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:40,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1883988372, now seen corresponding path program 1 times [2020-08-21 21:22:40,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:40,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938304418] [2020-08-21 21:22:40,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:40,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:40,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:40,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:40,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:22:40,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938304418] [2020-08-21 21:22:40,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:40,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:40,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341091895] [2020-08-21 21:22:40,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:40,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:40,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:40,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:40,350 INFO L87 Difference]: Start difference. First operand 7304 states and 9350 transitions. Second operand 3 states. [2020-08-21 21:22:40,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:40,519 INFO L93 Difference]: Finished difference Result 8076 states and 10632 transitions. [2020-08-21 21:22:40,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:40,519 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 21:22:40,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:40,537 INFO L225 Difference]: With dead ends: 8076 [2020-08-21 21:22:40,537 INFO L226 Difference]: Without dead ends: 8074 [2020-08-21 21:22:40,539 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 21:22:40,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-21 21:22:40,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 7304. [2020-08-21 21:22:40,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-08-21 21:22:40,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9222 transitions. [2020-08-21 21:22:40,731 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9222 transitions. Word has length 27 [2020-08-21 21:22:40,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:40,731 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9222 transitions. [2020-08-21 21:22:40,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:40,731 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9222 transitions. [2020-08-21 21:22:40,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 21:22:40,748 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:40,749 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 21:22:40,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 21:22:40,749 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:40,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:40,749 INFO L82 PathProgramCache]: Analyzing trace with hash 715001129, now seen corresponding path program 1 times [2020-08-21 21:22:40,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:40,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600129213] [2020-08-21 21:22:40,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:40,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:40,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:40,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:40,795 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 21:22:40,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600129213] [2020-08-21 21:22:40,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:40,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:40,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083686988] [2020-08-21 21:22:40,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:40,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:40,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:40,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:40,797 INFO L87 Difference]: Start difference. First operand 7304 states and 9222 transitions. Second operand 3 states. [2020-08-21 21:22:41,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:41,022 INFO L93 Difference]: Finished difference Result 12172 states and 15496 transitions. [2020-08-21 21:22:41,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:41,023 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-21 21:22:41,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:41,047 INFO L225 Difference]: With dead ends: 12172 [2020-08-21 21:22:41,047 INFO L226 Difference]: Without dead ends: 12170 [2020-08-21 21:22:41,050 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 21:22:41,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12170 states. [2020-08-21 21:22:41,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12170 to 11144. [2020-08-21 21:22:41,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11144 states. [2020-08-21 21:22:41,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11144 states to 11144 states and 13702 transitions. [2020-08-21 21:22:41,338 INFO L78 Accepts]: Start accepts. Automaton has 11144 states and 13702 transitions. Word has length 28 [2020-08-21 21:22:41,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:41,338 INFO L479 AbstractCegarLoop]: Abstraction has 11144 states and 13702 transitions. [2020-08-21 21:22:41,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:41,338 INFO L276 IsEmpty]: Start isEmpty. Operand 11144 states and 13702 transitions. [2020-08-21 21:22:41,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 21:22:41,357 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:41,358 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 21:22:41,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 21:22:41,358 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:41,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:41,359 INFO L82 PathProgramCache]: Analyzing trace with hash 128195115, now seen corresponding path program 1 times [2020-08-21 21:22:41,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:41,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182212938] [2020-08-21 21:22:41,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:41,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:41,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:41,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:41,388 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 21:22:41,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182212938] [2020-08-21 21:22:41,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:41,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:41,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614551638] [2020-08-21 21:22:41,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:41,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:41,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:41,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:41,390 INFO L87 Difference]: Start difference. First operand 11144 states and 13702 transitions. Second operand 3 states. [2020-08-21 21:22:41,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:41,619 INFO L93 Difference]: Finished difference Result 25228 states and 30856 transitions. [2020-08-21 21:22:41,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:41,620 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-21 21:22:41,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:41,650 INFO L225 Difference]: With dead ends: 25228 [2020-08-21 21:22:41,650 INFO L226 Difference]: Without dead ends: 14218 [2020-08-21 21:22:41,674 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 21:22:41,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14218 states. [2020-08-21 21:22:42,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14218 to 14216. [2020-08-21 21:22:42,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14216 states. [2020-08-21 21:22:42,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14216 states to 14216 states and 16902 transitions. [2020-08-21 21:22:42,124 INFO L78 Accepts]: Start accepts. Automaton has 14216 states and 16902 transitions. Word has length 28 [2020-08-21 21:22:42,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:42,125 INFO L479 AbstractCegarLoop]: Abstraction has 14216 states and 16902 transitions. [2020-08-21 21:22:42,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:42,125 INFO L276 IsEmpty]: Start isEmpty. Operand 14216 states and 16902 transitions. [2020-08-21 21:22:42,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-21 21:22:42,144 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:42,145 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 21:22:42,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-21 21:22:42,145 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:42,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:42,145 INFO L82 PathProgramCache]: Analyzing trace with hash 690414627, now seen corresponding path program 1 times [2020-08-21 21:22:42,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:42,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184998806] [2020-08-21 21:22:42,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:42,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:42,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:42,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:42,176 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 21:22:42,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184998806] [2020-08-21 21:22:42,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:42,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:42,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896281060] [2020-08-21 21:22:42,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:42,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:42,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:42,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:42,179 INFO L87 Difference]: Start difference. First operand 14216 states and 16902 transitions. Second operand 3 states. [2020-08-21 21:22:42,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:42,356 INFO L93 Difference]: Finished difference Result 21516 states and 25608 transitions. [2020-08-21 21:22:42,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:42,357 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-21 21:22:42,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:42,475 INFO L225 Difference]: With dead ends: 21516 [2020-08-21 21:22:42,475 INFO L226 Difference]: Without dead ends: 14602 [2020-08-21 21:22:42,487 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 21:22:42,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14602 states. [2020-08-21 21:22:42,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14602 to 14600. [2020-08-21 21:22:42,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14600 states. [2020-08-21 21:22:42,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14600 states to 14600 states and 17158 transitions. [2020-08-21 21:22:42,777 INFO L78 Accepts]: Start accepts. Automaton has 14600 states and 17158 transitions. Word has length 29 [2020-08-21 21:22:42,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:42,777 INFO L479 AbstractCegarLoop]: Abstraction has 14600 states and 17158 transitions. [2020-08-21 21:22:42,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:42,778 INFO L276 IsEmpty]: Start isEmpty. Operand 14600 states and 17158 transitions. [2020-08-21 21:22:42,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-21 21:22:42,795 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:42,796 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 21:22:42,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-21 21:22:42,796 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:42,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:42,797 INFO L82 PathProgramCache]: Analyzing trace with hash -320702623, now seen corresponding path program 1 times [2020-08-21 21:22:42,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:42,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206187694] [2020-08-21 21:22:42,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:42,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:42,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:42,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:42,819 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 21:22:42,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206187694] [2020-08-21 21:22:42,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:42,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:42,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263006535] [2020-08-21 21:22:42,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:42,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:42,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:42,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:42,822 INFO L87 Difference]: Start difference. First operand 14600 states and 17158 transitions. Second operand 3 states. [2020-08-21 21:22:43,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:43,200 INFO L93 Difference]: Finished difference Result 23562 states and 27399 transitions. [2020-08-21 21:22:43,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:43,201 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-21 21:22:43,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:43,244 INFO L225 Difference]: With dead ends: 23562 [2020-08-21 21:22:43,245 INFO L226 Difference]: Without dead ends: 23560 [2020-08-21 21:22:43,249 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 21:22:43,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23560 states. [2020-08-21 21:22:43,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23560 to 22536. [2020-08-21 21:22:43,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22536 states. [2020-08-21 21:22:43,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22536 states to 22536 states and 25862 transitions. [2020-08-21 21:22:43,649 INFO L78 Accepts]: Start accepts. Automaton has 22536 states and 25862 transitions. Word has length 29 [2020-08-21 21:22:43,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:43,649 INFO L479 AbstractCegarLoop]: Abstraction has 22536 states and 25862 transitions. [2020-08-21 21:22:43,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:43,649 INFO L276 IsEmpty]: Start isEmpty. Operand 22536 states and 25862 transitions. [2020-08-21 21:22:43,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-21 21:22:43,684 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:22:43,684 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 21:22:43,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-21 21:22:43,684 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:22:43,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:22:43,685 INFO L82 PathProgramCache]: Analyzing trace with hash -907508637, now seen corresponding path program 1 times [2020-08-21 21:22:43,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:22:43,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532416426] [2020-08-21 21:22:43,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:22:43,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:43,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:22:43,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:22:43,713 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 21:22:43,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532416426] [2020-08-21 21:22:43,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:22:43,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:22:43,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832891633] [2020-08-21 21:22:43,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:22:43,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:22:43,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:22:43,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:22:43,719 INFO L87 Difference]: Start difference. First operand 22536 states and 25862 transitions. Second operand 3 states. [2020-08-21 21:22:44,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:22:44,159 INFO L93 Difference]: Finished difference Result 50184 states and 56582 transitions. [2020-08-21 21:22:44,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:22:44,161 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-21 21:22:44,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:22:44,162 INFO L225 Difference]: With dead ends: 50184 [2020-08-21 21:22:44,162 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 21:22:44,223 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 21:22:44,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 21:22:44,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 21:22:44,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 21:22:44,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 21:22:44,224 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-08-21 21:22:44,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:22:44,225 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 21:22:44,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:22:44,225 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 21:22:44,225 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 21:22:44,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-21 21:22:44,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 21:22:44,257 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 21:22:44,257 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 21:22:44,257 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 21:22:44,257 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 21:22:44,258 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 21:22:44,258 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 21:22:44,258 INFO L271 CegarLoopResult]: At program point L159(lines 5 163) the Hoare annotation is: true [2020-08-21 21:22:44,258 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 163) no Hoare annotation was computed. [2020-08-21 21:22:44,258 INFO L268 CegarLoopResult]: For program point L118-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 21:22:44,258 INFO L268 CegarLoopResult]: For program point L143-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 21:22:44,258 INFO L268 CegarLoopResult]: For program point L102-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 21:22:44,258 INFO L268 CegarLoopResult]: For program point L94-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 21:22:44,259 INFO L268 CegarLoopResult]: For program point L119(line 119) no Hoare annotation was computed. [2020-08-21 21:22:44,259 INFO L268 CegarLoopResult]: For program point L86-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 21:22:44,259 INFO L268 CegarLoopResult]: For program point L144(line 144) no Hoare annotation was computed. [2020-08-21 21:22:44,259 INFO L268 CegarLoopResult]: For program point L78-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 21:22:44,259 INFO L268 CegarLoopResult]: For program point L70-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 21:22:44,259 INFO L268 CegarLoopResult]: For program point L128-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 21:22:44,259 INFO L271 CegarLoopResult]: At program point L153-1(lines 39 158) the Hoare annotation is: true [2020-08-21 21:22:44,259 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 163) no Hoare annotation was computed. [2020-08-21 21:22:44,259 INFO L268 CegarLoopResult]: For program point L129(line 129) no Hoare annotation was computed. [2020-08-21 21:22:44,260 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 161) no Hoare annotation was computed. [2020-08-21 21:22:44,260 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 163) the Hoare annotation is: true [2020-08-21 21:22:44,260 INFO L268 CegarLoopResult]: For program point L154(line 154) no Hoare annotation was computed. [2020-08-21 21:22:44,260 INFO L264 CegarLoopResult]: At program point L154-1(lines 5 163) the Hoare annotation is: false [2020-08-21 21:22:44,260 INFO L268 CegarLoopResult]: For program point L113-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 21:22:44,260 INFO L268 CegarLoopResult]: For program point L138-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 21:22:44,260 INFO L268 CegarLoopResult]: For program point L114(line 114) no Hoare annotation was computed. [2020-08-21 21:22:44,260 INFO L268 CegarLoopResult]: For program point L139(line 139) no Hoare annotation was computed. [2020-08-21 21:22:44,261 INFO L268 CegarLoopResult]: For program point L98-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 21:22:44,261 INFO L268 CegarLoopResult]: For program point L123-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 21:22:44,262 INFO L268 CegarLoopResult]: For program point L90-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 21:22:44,262 INFO L268 CegarLoopResult]: For program point L148-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 21:22:44,262 INFO L268 CegarLoopResult]: For program point L82-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 21:22:44,262 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-08-21 21:22:44,262 INFO L268 CegarLoopResult]: For program point L74-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 21:22:44,262 INFO L268 CegarLoopResult]: For program point L66(lines 66 68) no Hoare annotation was computed. [2020-08-21 21:22:44,262 INFO L268 CegarLoopResult]: For program point L66-2(lines 39 158) no Hoare annotation was computed. [2020-08-21 21:22:44,262 INFO L268 CegarLoopResult]: For program point L124(line 124) no Hoare annotation was computed. [2020-08-21 21:22:44,262 INFO L268 CegarLoopResult]: For program point L149(line 149) no Hoare annotation was computed. [2020-08-21 21:22:44,263 INFO L268 CegarLoopResult]: For program point L108-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 21:22:44,263 INFO L268 CegarLoopResult]: For program point L133-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 21:22:44,263 INFO L268 CegarLoopResult]: For program point L109(line 109) no Hoare annotation was computed. [2020-08-21 21:22:44,263 INFO L268 CegarLoopResult]: For program point L134(line 134) no Hoare annotation was computed. [2020-08-21 21:22:44,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 09:22:44 BoogieIcfgContainer [2020-08-21 21:22:44,279 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 21:22:44,282 INFO L168 Benchmark]: Toolchain (without parser) took 8734.74 ms. Allocated memory was 138.9 MB in the beginning and 546.3 MB in the end (delta: 407.4 MB). Free memory was 101.8 MB in the beginning and 293.2 MB in the end (delta: -191.3 MB). Peak memory consumption was 216.0 MB. Max. memory is 7.1 GB. [2020-08-21 21:22:44,284 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 21:22:44,285 INFO L168 Benchmark]: CACSL2BoogieTranslator took 496.72 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 101.4 MB in the beginning and 181.4 MB in the end (delta: -80.0 MB). Peak memory consumption was 21.9 MB. Max. memory is 7.1 GB. [2020-08-21 21:22:44,290 INFO L168 Benchmark]: Boogie Preprocessor took 66.21 ms. Allocated memory is still 203.4 MB. Free memory was 181.4 MB in the beginning and 180.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-08-21 21:22:44,290 INFO L168 Benchmark]: RCFGBuilder took 410.82 ms. Allocated memory is still 203.4 MB. Free memory was 180.0 MB in the beginning and 160.5 MB in the end (delta: 19.5 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. [2020-08-21 21:22:44,292 INFO L168 Benchmark]: TraceAbstraction took 7755.10 ms. Allocated memory was 203.4 MB in the beginning and 546.3 MB in the end (delta: 342.9 MB). Free memory was 159.8 MB in the beginning and 293.2 MB in the end (delta: -133.3 MB). Peak memory consumption was 209.6 MB. Max. memory is 7.1 GB. [2020-08-21 21:22:44,297 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 496.72 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 101.4 MB in the beginning and 181.4 MB in the end (delta: -80.0 MB). Peak memory consumption was 21.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 66.21 ms. Allocated memory is still 203.4 MB. Free memory was 181.4 MB in the beginning and 180.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 410.82 ms. Allocated memory is still 203.4 MB. Free memory was 180.0 MB in the beginning and 160.5 MB in the end (delta: 19.5 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7755.10 ms. Allocated memory was 203.4 MB in the beginning and 546.3 MB in the end (delta: 342.9 MB). Free memory was 159.8 MB in the beginning and 293.2 MB in the end (delta: -133.3 MB). Peak memory consumption was 209.6 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: 7.6s, OverallIterations: 28, TraceHistogramMax: 1, AutomataDifference: 3.2s, 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: 2.6s 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, 0.6s 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...