/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 21:06:59,107 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 21:06:59,110 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 21:06:59,151 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 21:06:59,152 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 21:06:59,160 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 21:06:59,162 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 21:06:59,166 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 21:06:59,168 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 21:06:59,171 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 21:06:59,172 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 21:06:59,173 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 21:06:59,174 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 21:06:59,177 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 21:06:59,180 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 21:06:59,181 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 21:06:59,184 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 21:06:59,186 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 21:06:59,188 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 21:06:59,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 21:06:59,201 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 21:06:59,202 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 21:06:59,203 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 21:06:59,204 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 21:06:59,216 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 21:06:59,232 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 21:06:59,235 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 21:06:59,236 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 21:06:59,237 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 21:06:59,277 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 21:06:59,278 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 21:06:59,279 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 21:06:59,280 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 21:06:59,280 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 21:06:59,280 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 21:06:59,281 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 21:06:59,281 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 21:06:59,281 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 21:06:59,281 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 21:06:59,282 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 21:06:59,283 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 21:06:59,283 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 21:06:59,283 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 21:06:59,284 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 21:06:59,285 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 21:06:59,285 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 21:06:59,285 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 21:06:59,285 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 21:06:59,285 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 21:06:59,286 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 21:06:59,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:06:59,286 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 21:06:59,286 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 21:06:59,287 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 21:06:59,287 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 21:06:59,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 21:06:59,287 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 21:06:59,287 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 21:06:59,287 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=DEEPEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=DEEPEST; [2020-08-18 21:06:59,585 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 21:06:59,595 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 21:06:59,598 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 21:06:59,600 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 21:06:59,600 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 21:06:59,602 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_5.c [2020-08-18 21:06:59,666 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e790b122e/68e0c54d6d794468bf21eece1932e977/FLAGff6be8e70 [2020-08-18 21:07:00,133 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 21:07:00,136 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_5.c [2020-08-18 21:07:00,144 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e790b122e/68e0c54d6d794468bf21eece1932e977/FLAGff6be8e70 [2020-08-18 21:07:00,499 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e790b122e/68e0c54d6d794468bf21eece1932e977 [2020-08-18 21:07:00,509 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 21:07:00,511 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 21:07:00,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 21:07:00,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 21:07:00,516 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 21:07:00,517 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:07:00" (1/1) ... [2020-08-18 21:07:00,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@532b1c07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:00, skipping insertion in model container [2020-08-18 21:07:00,520 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:07:00" (1/1) ... [2020-08-18 21:07:00,528 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 21:07:00,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 21:07:00,731 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:07:00,735 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 21:07:00,753 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:07:00,765 INFO L208 MainTranslator]: Completed translation [2020-08-18 21:07:00,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:00 WrapperNode [2020-08-18 21:07:00,766 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 21:07:00,766 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 21:07:00,767 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 21:07:00,767 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 21:07:00,777 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:00" (1/1) ... [2020-08-18 21:07:00,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:00" (1/1) ... [2020-08-18 21:07:00,871 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:00" (1/1) ... [2020-08-18 21:07:00,871 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:00" (1/1) ... [2020-08-18 21:07:00,876 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:00" (1/1) ... [2020-08-18 21:07:00,883 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:00" (1/1) ... [2020-08-18 21:07:00,884 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:00" (1/1) ... [2020-08-18 21:07:00,886 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 21:07:00,886 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 21:07:00,886 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 21:07:00,887 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 21:07:00,888 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:00" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:07:00,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 21:07:00,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 21:07:00,952 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 21:07:00,952 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 21:07:00,952 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 21:07:00,952 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 21:07:00,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 21:07:00,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 21:07:01,210 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 21:07:01,211 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 21:07:01,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:07:01 BoogieIcfgContainer [2020-08-18 21:07:01,215 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 21:07:01,219 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 21:07:01,219 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 21:07:01,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 21:07:01,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 09:07:00" (1/3) ... [2020-08-18 21:07:01,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ac0e08b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:07:01, skipping insertion in model container [2020-08-18 21:07:01,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:00" (2/3) ... [2020-08-18 21:07:01,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ac0e08b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:07:01, skipping insertion in model container [2020-08-18 21:07:01,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:07:01" (3/3) ... [2020-08-18 21:07:01,244 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_5.c [2020-08-18 21:07:01,268 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 21:07:01,280 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 21:07:01,292 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 21:07:01,315 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 21:07:01,315 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 21:07:01,316 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 21:07:01,316 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 21:07:01,316 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 21:07:01,316 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 21:07:01,316 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 21:07:01,316 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 21:07:01,333 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-08-18 21:07:01,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-18 21:07:01,338 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:01,339 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:01,340 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:01,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:01,346 INFO L82 PathProgramCache]: Analyzing trace with hash 316328318, now seen corresponding path program 1 times [2020-08-18 21:07:01,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:01,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819252864] [2020-08-18 21:07:01,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:01,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:01,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:01,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:01,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:01,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819252864] [2020-08-18 21:07:01,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:01,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:01,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789881278] [2020-08-18 21:07:01,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:01,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:01,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:01,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:01,570 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-08-18 21:07:01,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:01,651 INFO L93 Difference]: Finished difference Result 57 states and 90 transitions. [2020-08-18 21:07:01,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:01,653 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-08-18 21:07:01,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:01,665 INFO L225 Difference]: With dead ends: 57 [2020-08-18 21:07:01,665 INFO L226 Difference]: Without dead ends: 42 [2020-08-18 21:07:01,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:01,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-18 21:07:01,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2020-08-18 21:07:01,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 21:07:01,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 49 transitions. [2020-08-18 21:07:01,709 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 49 transitions. Word has length 15 [2020-08-18 21:07:01,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:01,709 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 49 transitions. [2020-08-18 21:07:01,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:01,710 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 49 transitions. [2020-08-18 21:07:01,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-18 21:07:01,711 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:01,711 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:01,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 21:07:01,712 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:01,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:01,712 INFO L82 PathProgramCache]: Analyzing trace with hash -493018308, now seen corresponding path program 1 times [2020-08-18 21:07:01,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:01,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458985266] [2020-08-18 21:07:01,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:01,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:01,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:01,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:01,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:01,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458985266] [2020-08-18 21:07:01,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:01,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:01,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031199121] [2020-08-18 21:07:01,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:01,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:01,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:01,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:01,793 INFO L87 Difference]: Start difference. First operand 30 states and 49 transitions. Second operand 3 states. [2020-08-18 21:07:01,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:01,831 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2020-08-18 21:07:01,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:01,832 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-08-18 21:07:01,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:01,834 INFO L225 Difference]: With dead ends: 67 [2020-08-18 21:07:01,834 INFO L226 Difference]: Without dead ends: 42 [2020-08-18 21:07:01,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:01,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-18 21:07:01,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-08-18 21:07:01,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-18 21:07:01,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 65 transitions. [2020-08-18 21:07:01,849 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 65 transitions. Word has length 15 [2020-08-18 21:07:01,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:01,850 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 65 transitions. [2020-08-18 21:07:01,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:01,850 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 65 transitions. [2020-08-18 21:07:01,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 21:07:01,851 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:01,851 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:01,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 21:07:01,852 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:01,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:01,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1216458266, now seen corresponding path program 1 times [2020-08-18 21:07:01,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:01,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646781352] [2020-08-18 21:07:01,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:01,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:01,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:01,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:01,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:01,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646781352] [2020-08-18 21:07:01,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:01,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:01,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545528461] [2020-08-18 21:07:01,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:01,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:01,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:01,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:01,905 INFO L87 Difference]: Start difference. First operand 40 states and 65 transitions. Second operand 3 states. [2020-08-18 21:07:01,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:01,932 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-08-18 21:07:01,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:01,933 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-18 21:07:01,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:01,934 INFO L225 Difference]: With dead ends: 63 [2020-08-18 21:07:01,934 INFO L226 Difference]: Without dead ends: 45 [2020-08-18 21:07:01,935 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 [2020-08-18 21:07:01,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-18 21:07:01,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2020-08-18 21:07:01,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-18 21:07:01,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 67 transitions. [2020-08-18 21:07:01,943 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 67 transitions. Word has length 16 [2020-08-18 21:07:01,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:01,944 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 67 transitions. [2020-08-18 21:07:01,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:01,944 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 67 transitions. [2020-08-18 21:07:01,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 21:07:01,945 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:01,945 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:01,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 21:07:01,946 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:01,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:01,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1896516636, now seen corresponding path program 1 times [2020-08-18 21:07:01,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:01,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188151280] [2020-08-18 21:07:01,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:01,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:01,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:01,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:01,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:01,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188151280] [2020-08-18 21:07:01,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:01,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:01,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106693260] [2020-08-18 21:07:01,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:02,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:02,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:02,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:02,001 INFO L87 Difference]: Start difference. First operand 43 states and 67 transitions. Second operand 3 states. [2020-08-18 21:07:02,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:02,022 INFO L93 Difference]: Finished difference Result 76 states and 120 transitions. [2020-08-18 21:07:02,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:02,023 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-18 21:07:02,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:02,024 INFO L225 Difference]: With dead ends: 76 [2020-08-18 21:07:02,025 INFO L226 Difference]: Without dead ends: 74 [2020-08-18 21:07:02,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:02,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-18 21:07:02,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2020-08-18 21:07:02,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-18 21:07:02,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 88 transitions. [2020-08-18 21:07:02,039 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 88 transitions. Word has length 16 [2020-08-18 21:07:02,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:02,039 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 88 transitions. [2020-08-18 21:07:02,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:02,040 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 88 transitions. [2020-08-18 21:07:02,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 21:07:02,041 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:02,041 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:02,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 21:07:02,042 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:02,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:02,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1087170010, now seen corresponding path program 1 times [2020-08-18 21:07:02,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:02,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190856330] [2020-08-18 21:07:02,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:02,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:02,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:02,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:02,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:02,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190856330] [2020-08-18 21:07:02,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:02,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:02,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507410960] [2020-08-18 21:07:02,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:02,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:02,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:02,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:02,120 INFO L87 Difference]: Start difference. First operand 56 states and 88 transitions. Second operand 3 states. [2020-08-18 21:07:02,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:02,140 INFO L93 Difference]: Finished difference Result 124 states and 198 transitions. [2020-08-18 21:07:02,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:02,141 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-18 21:07:02,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:02,142 INFO L225 Difference]: With dead ends: 124 [2020-08-18 21:07:02,142 INFO L226 Difference]: Without dead ends: 76 [2020-08-18 21:07:02,143 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 [2020-08-18 21:07:02,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-18 21:07:02,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-08-18 21:07:02,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-18 21:07:02,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 114 transitions. [2020-08-18 21:07:02,154 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 114 transitions. Word has length 16 [2020-08-18 21:07:02,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:02,154 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 114 transitions. [2020-08-18 21:07:02,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:02,154 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 114 transitions. [2020-08-18 21:07:02,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 21:07:02,155 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:02,155 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:02,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 21:07:02,156 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:02,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:02,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1337311087, now seen corresponding path program 1 times [2020-08-18 21:07:02,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:02,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421264724] [2020-08-18 21:07:02,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:02,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:02,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:02,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:02,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:02,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421264724] [2020-08-18 21:07:02,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:02,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:02,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731456311] [2020-08-18 21:07:02,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:02,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:02,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:02,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:02,189 INFO L87 Difference]: Start difference. First operand 74 states and 114 transitions. Second operand 3 states. [2020-08-18 21:07:02,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:02,217 INFO L93 Difference]: Finished difference Result 111 states and 169 transitions. [2020-08-18 21:07:02,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:02,218 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-18 21:07:02,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:02,219 INFO L225 Difference]: With dead ends: 111 [2020-08-18 21:07:02,219 INFO L226 Difference]: Without dead ends: 78 [2020-08-18 21:07:02,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:02,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-18 21:07:02,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-08-18 21:07:02,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-18 21:07:02,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 114 transitions. [2020-08-18 21:07:02,230 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 114 transitions. Word has length 17 [2020-08-18 21:07:02,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:02,231 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 114 transitions. [2020-08-18 21:07:02,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:02,231 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 114 transitions. [2020-08-18 21:07:02,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 21:07:02,232 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:02,232 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:02,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 21:07:02,233 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:02,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:02,234 INFO L82 PathProgramCache]: Analyzing trace with hash -657252717, now seen corresponding path program 1 times [2020-08-18 21:07:02,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:02,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236814380] [2020-08-18 21:07:02,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:02,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:02,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:02,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:02,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:02,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236814380] [2020-08-18 21:07:02,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:02,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:02,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100817259] [2020-08-18 21:07:02,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:02,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:02,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:02,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:02,266 INFO L87 Difference]: Start difference. First operand 76 states and 114 transitions. Second operand 3 states. [2020-08-18 21:07:02,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:02,287 INFO L93 Difference]: Finished difference Result 132 states and 200 transitions. [2020-08-18 21:07:02,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:02,287 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-18 21:07:02,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:02,289 INFO L225 Difference]: With dead ends: 132 [2020-08-18 21:07:02,289 INFO L226 Difference]: Without dead ends: 130 [2020-08-18 21:07:02,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:02,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-08-18 21:07:02,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 104. [2020-08-18 21:07:02,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-18 21:07:02,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 154 transitions. [2020-08-18 21:07:02,303 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 154 transitions. Word has length 17 [2020-08-18 21:07:02,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:02,303 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 154 transitions. [2020-08-18 21:07:02,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:02,304 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 154 transitions. [2020-08-18 21:07:02,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 21:07:02,305 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:02,305 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:02,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 21:07:02,306 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:02,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:02,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1466599343, now seen corresponding path program 1 times [2020-08-18 21:07:02,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:02,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556632864] [2020-08-18 21:07:02,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:02,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:02,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:02,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:02,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:02,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556632864] [2020-08-18 21:07:02,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:02,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:02,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661970070] [2020-08-18 21:07:02,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:02,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:02,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:02,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:02,337 INFO L87 Difference]: Start difference. First operand 104 states and 154 transitions. Second operand 3 states. [2020-08-18 21:07:02,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:02,365 INFO L93 Difference]: Finished difference Result 232 states and 344 transitions. [2020-08-18 21:07:02,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:02,366 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-18 21:07:02,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:02,377 INFO L225 Difference]: With dead ends: 232 [2020-08-18 21:07:02,377 INFO L226 Difference]: Without dead ends: 138 [2020-08-18 21:07:02,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:02,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-18 21:07:02,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-08-18 21:07:02,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-18 21:07:02,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 194 transitions. [2020-08-18 21:07:02,392 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 194 transitions. Word has length 17 [2020-08-18 21:07:02,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:02,393 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 194 transitions. [2020-08-18 21:07:02,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:02,393 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 194 transitions. [2020-08-18 21:07:02,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 21:07:02,394 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:02,395 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:02,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 21:07:02,395 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:02,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:02,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1100217935, now seen corresponding path program 1 times [2020-08-18 21:07:02,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:02,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969712890] [2020-08-18 21:07:02,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:02,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:02,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:02,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:02,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:02,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969712890] [2020-08-18 21:07:02,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:02,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:02,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978939014] [2020-08-18 21:07:02,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:02,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:02,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:02,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:02,422 INFO L87 Difference]: Start difference. First operand 136 states and 194 transitions. Second operand 3 states. [2020-08-18 21:07:02,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:02,439 INFO L93 Difference]: Finished difference Result 204 states and 288 transitions. [2020-08-18 21:07:02,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:02,440 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 21:07:02,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:02,441 INFO L225 Difference]: With dead ends: 204 [2020-08-18 21:07:02,441 INFO L226 Difference]: Without dead ends: 142 [2020-08-18 21:07:02,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:02,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-08-18 21:07:02,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2020-08-18 21:07:02,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-18 21:07:02,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 194 transitions. [2020-08-18 21:07:02,454 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 194 transitions. Word has length 18 [2020-08-18 21:07:02,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:02,454 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 194 transitions. [2020-08-18 21:07:02,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:02,455 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 194 transitions. [2020-08-18 21:07:02,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 21:07:02,456 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:02,456 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:02,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 21:07:02,457 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:02,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:02,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1780276305, now seen corresponding path program 1 times [2020-08-18 21:07:02,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:02,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748850528] [2020-08-18 21:07:02,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:02,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:02,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:02,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:02,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:02,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748850528] [2020-08-18 21:07:02,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:02,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:02,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720913966] [2020-08-18 21:07:02,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:02,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:02,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:02,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:02,496 INFO L87 Difference]: Start difference. First operand 140 states and 194 transitions. Second operand 3 states. [2020-08-18 21:07:02,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:02,523 INFO L93 Difference]: Finished difference Result 236 states and 328 transitions. [2020-08-18 21:07:02,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:02,524 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 21:07:02,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:02,526 INFO L225 Difference]: With dead ends: 236 [2020-08-18 21:07:02,526 INFO L226 Difference]: Without dead ends: 234 [2020-08-18 21:07:02,527 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 [2020-08-18 21:07:02,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-08-18 21:07:02,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 200. [2020-08-18 21:07:02,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-18 21:07:02,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 270 transitions. [2020-08-18 21:07:02,543 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 270 transitions. Word has length 18 [2020-08-18 21:07:02,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:02,543 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 270 transitions. [2020-08-18 21:07:02,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:02,543 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 270 transitions. [2020-08-18 21:07:02,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 21:07:02,545 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:02,545 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:02,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 21:07:02,546 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:02,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:02,546 INFO L82 PathProgramCache]: Analyzing trace with hash 970929679, now seen corresponding path program 1 times [2020-08-18 21:07:02,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:02,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942155134] [2020-08-18 21:07:02,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:02,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:02,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:02,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:02,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:02,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942155134] [2020-08-18 21:07:02,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:02,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:02,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927998798] [2020-08-18 21:07:02,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:02,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:02,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:02,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:02,573 INFO L87 Difference]: Start difference. First operand 200 states and 270 transitions. Second operand 3 states. [2020-08-18 21:07:02,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:02,595 INFO L93 Difference]: Finished difference Result 444 states and 592 transitions. [2020-08-18 21:07:02,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:02,596 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 21:07:02,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:02,598 INFO L225 Difference]: With dead ends: 444 [2020-08-18 21:07:02,598 INFO L226 Difference]: Without dead ends: 258 [2020-08-18 21:07:02,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:02,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-08-18 21:07:02,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-08-18 21:07:02,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-18 21:07:02,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 326 transitions. [2020-08-18 21:07:02,615 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 326 transitions. Word has length 18 [2020-08-18 21:07:02,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:02,615 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 326 transitions. [2020-08-18 21:07:02,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:02,615 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 326 transitions. [2020-08-18 21:07:02,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 21:07:02,617 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:02,617 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:02,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 21:07:02,618 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:02,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:02,618 INFO L82 PathProgramCache]: Analyzing trace with hash -645793370, now seen corresponding path program 1 times [2020-08-18 21:07:02,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:02,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [567088979] [2020-08-18 21:07:02,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:02,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:02,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:02,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:02,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:02,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [567088979] [2020-08-18 21:07:02,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:02,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:02,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235049733] [2020-08-18 21:07:02,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:02,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:02,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:02,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:02,642 INFO L87 Difference]: Start difference. First operand 256 states and 326 transitions. Second operand 3 states. [2020-08-18 21:07:02,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:02,661 INFO L93 Difference]: Finished difference Result 384 states and 484 transitions. [2020-08-18 21:07:02,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:02,662 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 21:07:02,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:02,664 INFO L225 Difference]: With dead ends: 384 [2020-08-18 21:07:02,664 INFO L226 Difference]: Without dead ends: 266 [2020-08-18 21:07:02,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:02,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-08-18 21:07:02,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 264. [2020-08-18 21:07:02,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-08-18 21:07:02,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 326 transitions. [2020-08-18 21:07:02,677 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 326 transitions. Word has length 19 [2020-08-18 21:07:02,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:02,678 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 326 transitions. [2020-08-18 21:07:02,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:02,678 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 326 transitions. [2020-08-18 21:07:02,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 21:07:02,680 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:02,680 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:02,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 21:07:02,681 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:02,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:02,681 INFO L82 PathProgramCache]: Analyzing trace with hash 34265000, now seen corresponding path program 1 times [2020-08-18 21:07:02,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:02,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624718795] [2020-08-18 21:07:02,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:02,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:02,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:02,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:02,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:02,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624718795] [2020-08-18 21:07:02,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:02,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:02,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89283455] [2020-08-18 21:07:02,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:02,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:02,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:02,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:02,704 INFO L87 Difference]: Start difference. First operand 264 states and 326 transitions. Second operand 3 states. [2020-08-18 21:07:02,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:02,728 INFO L93 Difference]: Finished difference Result 426 states and 519 transitions. [2020-08-18 21:07:02,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:02,728 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 21:07:02,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:02,733 INFO L225 Difference]: With dead ends: 426 [2020-08-18 21:07:02,733 INFO L226 Difference]: Without dead ends: 424 [2020-08-18 21:07:02,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:02,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2020-08-18 21:07:02,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 392. [2020-08-18 21:07:02,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-08-18 21:07:02,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 470 transitions. [2020-08-18 21:07:02,751 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 470 transitions. Word has length 19 [2020-08-18 21:07:02,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:02,752 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 470 transitions. [2020-08-18 21:07:02,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:02,752 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 470 transitions. [2020-08-18 21:07:02,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 21:07:02,754 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:07:02,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:07:02,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 21:07:02,754 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:07:02,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:07:02,755 INFO L82 PathProgramCache]: Analyzing trace with hash -775081626, now seen corresponding path program 1 times [2020-08-18 21:07:02,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:07:02,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541117366] [2020-08-18 21:07:02,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:07:02,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:02,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:07:02,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:07:02,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:07:02,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541117366] [2020-08-18 21:07:02,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:07:02,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:07:02,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574288662] [2020-08-18 21:07:02,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:07:02,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:07:02,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:07:02,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:02,812 INFO L87 Difference]: Start difference. First operand 392 states and 470 transitions. Second operand 3 states. [2020-08-18 21:07:02,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:07:02,839 INFO L93 Difference]: Finished difference Result 856 states and 998 transitions. [2020-08-18 21:07:02,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:07:02,839 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 21:07:02,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:07:02,840 INFO L225 Difference]: With dead ends: 856 [2020-08-18 21:07:02,840 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 21:07:02,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:07:02,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 21:07:02,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 21:07:02,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 21:07:02,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 21:07:02,843 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-08-18 21:07:02,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:07:02,843 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 21:07:02,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:07:02,844 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 21:07:02,844 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 21:07:02,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 21:07:02,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 21:07:02,870 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 21:07:02,871 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 21:07:02,871 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 21:07:02,871 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 21:07:02,871 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 21:07:02,871 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 21:07:02,871 INFO L268 CegarLoopResult]: For program point L64(line 64) no Hoare annotation was computed. [2020-08-18 21:07:02,872 INFO L271 CegarLoopResult]: At program point L89(lines 5 93) the Hoare annotation is: true [2020-08-18 21:07:02,872 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 93) no Hoare annotation was computed. [2020-08-18 21:07:02,872 INFO L268 CegarLoopResult]: For program point L73-1(lines 24 88) no Hoare annotation was computed. [2020-08-18 21:07:02,872 INFO L268 CegarLoopResult]: For program point L69(line 69) no Hoare annotation was computed. [2020-08-18 21:07:02,872 INFO L268 CegarLoopResult]: For program point L57-1(lines 24 88) no Hoare annotation was computed. [2020-08-18 21:07:02,872 INFO L268 CegarLoopResult]: For program point L53-1(lines 24 88) no Hoare annotation was computed. [2020-08-18 21:07:02,872 INFO L268 CegarLoopResult]: For program point L49-1(lines 24 88) no Hoare annotation was computed. [2020-08-18 21:07:02,872 INFO L268 CegarLoopResult]: For program point L78-1(lines 24 88) no Hoare annotation was computed. [2020-08-18 21:07:02,873 INFO L268 CegarLoopResult]: For program point L45-1(lines 24 88) no Hoare annotation was computed. [2020-08-18 21:07:02,873 INFO L268 CegarLoopResult]: For program point L74(line 74) no Hoare annotation was computed. [2020-08-18 21:07:02,873 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-08-18 21:07:02,873 INFO L268 CegarLoopResult]: For program point L41-2(lines 24 88) no Hoare annotation was computed. [2020-08-18 21:07:02,873 INFO L271 CegarLoopResult]: At program point L83-1(lines 24 88) the Hoare annotation is: true [2020-08-18 21:07:02,873 INFO L268 CegarLoopResult]: For program point L79(line 79) no Hoare annotation was computed. [2020-08-18 21:07:02,874 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 93) no Hoare annotation was computed. [2020-08-18 21:07:02,874 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 91) no Hoare annotation was computed. [2020-08-18 21:07:02,874 INFO L268 CegarLoopResult]: For program point L63-1(lines 24 88) no Hoare annotation was computed. [2020-08-18 21:07:02,874 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 93) the Hoare annotation is: true [2020-08-18 21:07:02,874 INFO L268 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-08-18 21:07:02,874 INFO L268 CegarLoopResult]: For program point L84(line 84) no Hoare annotation was computed. [2020-08-18 21:07:02,875 INFO L264 CegarLoopResult]: At program point L84-1(lines 5 93) the Hoare annotation is: false [2020-08-18 21:07:02,875 INFO L268 CegarLoopResult]: For program point L68-1(lines 24 88) no Hoare annotation was computed. [2020-08-18 21:07:02,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 09:07:02 BoogieIcfgContainer [2020-08-18 21:07:02,888 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 21:07:02,890 INFO L168 Benchmark]: Toolchain (without parser) took 2378.98 ms. Allocated memory was 148.9 MB in the beginning and 232.3 MB in the end (delta: 83.4 MB). Free memory was 103.4 MB in the beginning and 137.2 MB in the end (delta: -33.8 MB). Peak memory consumption was 49.5 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:02,891 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 148.9 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 21:07:02,892 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.51 ms. Allocated memory is still 148.9 MB. Free memory was 103.2 MB in the beginning and 93.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:02,893 INFO L168 Benchmark]: Boogie Preprocessor took 119.59 ms. Allocated memory was 148.9 MB in the beginning and 205.5 MB in the end (delta: 56.6 MB). Free memory was 93.3 MB in the beginning and 183.5 MB in the end (delta: -90.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:02,894 INFO L168 Benchmark]: RCFGBuilder took 329.02 ms. Allocated memory is still 205.5 MB. Free memory was 183.5 MB in the beginning and 169.0 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:02,894 INFO L168 Benchmark]: TraceAbstraction took 1668.92 ms. Allocated memory was 205.5 MB in the beginning and 232.3 MB in the end (delta: 26.7 MB). Free memory was 168.4 MB in the beginning and 137.2 MB in the end (delta: 31.2 MB). Peak memory consumption was 57.9 MB. Max. memory is 7.1 GB. [2020-08-18 21:07:02,898 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 148.9 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 254.51 ms. Allocated memory is still 148.9 MB. Free memory was 103.2 MB in the beginning and 93.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.59 ms. Allocated memory was 148.9 MB in the beginning and 205.5 MB in the end (delta: 56.6 MB). Free memory was 93.3 MB in the beginning and 183.5 MB in the end (delta: -90.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 329.02 ms. Allocated memory is still 205.5 MB. Free memory was 183.5 MB in the beginning and 169.0 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1668.92 ms. Allocated memory was 205.5 MB in the beginning and 232.3 MB in the end (delta: 26.7 MB). Free memory was 168.4 MB in the beginning and 137.2 MB in the end (delta: 31.2 MB). Peak memory consumption was 57.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 91]: 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: 24]: 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, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.5s, OverallIterations: 14, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 654 SDtfs, 285 SDslu, 428 SDs, 0 SdLazy, 75 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=392occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 138 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 42 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 240 NumberOfCodeBlocks, 240 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 226 ConstructedInterpolants, 0 QuantifiedInterpolants, 6424 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 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...