/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 false -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 15:28:54,991 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 15:28:54,993 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 15:28:55,018 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 15:28:55,019 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 15:28:55,021 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 15:28:55,029 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 15:28:55,030 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 15:28:55,034 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 15:28:55,034 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 15:28:55,036 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 15:28:55,037 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 15:28:55,037 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 15:28:55,040 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 15:28:55,042 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 15:28:55,043 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 15:28:55,044 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 15:28:55,045 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 15:28:55,049 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 15:28:55,056 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 15:28:55,059 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 15:28:55,061 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 15:28:55,064 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 15:28:55,065 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 15:28:55,075 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 15:28:55,087 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 15:28:55,089 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 15:28:55,090 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 15:28:55,091 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 15:28:55,135 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 15:28:55,135 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 15:28:55,137 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 15:28:55,138 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 15:28:55,138 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 15:28:55,138 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 15:28:55,139 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 15:28:55,139 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 15:28:55,139 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 15:28:55,139 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 15:28:55,140 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 15:28:55,140 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 15:28:55,141 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 15:28:55,141 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 15:28:55,141 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 15:28:55,141 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 15:28:55,142 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 15:28:55,142 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 15:28:55,142 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 15:28:55,142 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 15:28:55,142 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 15:28:55,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 15:28:55,143 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 15:28:55,143 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 15:28:55,143 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 15:28:55,143 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 15:28:55,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 15:28:55,144 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 15:28:55,144 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 15:28:55,144 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 -> false [2020-08-18 15:28:55,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 15:28:55,476 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 15:28:55,482 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 15:28:55,483 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 15:28:55,484 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 15:28:55,485 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_5.c [2020-08-18 15:28:55,560 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aae4be7a7/062b656168d74960a9034f5bfdd71b2d/FLAGc41ca202b [2020-08-18 15:28:56,087 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 15:28:56,089 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_5.c [2020-08-18 15:28:56,098 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aae4be7a7/062b656168d74960a9034f5bfdd71b2d/FLAGc41ca202b [2020-08-18 15:28:56,491 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aae4be7a7/062b656168d74960a9034f5bfdd71b2d [2020-08-18 15:28:56,502 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 15:28:56,503 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 15:28:56,504 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 15:28:56,505 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 15:28:56,509 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 15:28:56,510 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 03:28:56" (1/1) ... [2020-08-18 15:28:56,513 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@682ba3bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:56, skipping insertion in model container [2020-08-18 15:28:56,513 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 03:28:56" (1/1) ... [2020-08-18 15:28:56,521 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 15:28:56,555 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 15:28:56,747 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 15:28:56,752 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 15:28:56,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 15:28:56,796 INFO L208 MainTranslator]: Completed translation [2020-08-18 15:28:56,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:56 WrapperNode [2020-08-18 15:28:56,797 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 15:28:56,798 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 15:28:56,798 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 15:28:56,798 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 15:28:56,808 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:56" (1/1) ... [2020-08-18 15:28:56,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:56" (1/1) ... [2020-08-18 15:28:56,896 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:56" (1/1) ... [2020-08-18 15:28:56,896 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:56" (1/1) ... [2020-08-18 15:28:56,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:56" (1/1) ... [2020-08-18 15:28:56,906 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:56" (1/1) ... [2020-08-18 15:28:56,907 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:56" (1/1) ... [2020-08-18 15:28:56,909 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 15:28:56,910 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 15:28:56,910 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 15:28:56,910 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 15:28:56,911 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:56" (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 15:28:56,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 15:28:56,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 15:28:56,974 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 15:28:56,974 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 15:28:56,974 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 15:28:56,974 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 15:28:56,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 15:28:56,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 15:28:57,208 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 15:28:57,209 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 15:28:57,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 03:28:57 BoogieIcfgContainer [2020-08-18 15:28:57,214 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 15:28:57,215 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 15:28:57,215 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 15:28:57,219 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 15:28:57,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 03:28:56" (1/3) ... [2020-08-18 15:28:57,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30b8626 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 03:28:57, skipping insertion in model container [2020-08-18 15:28:57,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:28:56" (2/3) ... [2020-08-18 15:28:57,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30b8626 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 03:28:57, skipping insertion in model container [2020-08-18 15:28:57,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 03:28:57" (3/3) ... [2020-08-18 15:28:57,222 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_5.c [2020-08-18 15:28:57,234 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 15:28:57,242 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 15:28:57,262 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 15:28:57,298 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 15:28:57,298 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 15:28:57,299 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 15:28:57,299 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 15:28:57,299 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 15:28:57,299 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 15:28:57,300 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 15:28:57,301 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 15:28:57,340 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-08-18 15:28:57,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-18 15:28:57,347 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:57,348 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:57,349 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:57,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:57,365 INFO L82 PathProgramCache]: Analyzing trace with hash 316328318, now seen corresponding path program 1 times [2020-08-18 15:28:57,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:57,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655403482] [2020-08-18 15:28:57,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:57,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:57,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:57,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:57,561 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 15:28:57,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655403482] [2020-08-18 15:28:57,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:28:57,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:28:57,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647917300] [2020-08-18 15:28:57,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:28:57,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:57,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:28:57,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:57,592 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-08-18 15:28:57,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:57,672 INFO L93 Difference]: Finished difference Result 57 states and 90 transitions. [2020-08-18 15:28:57,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:28:57,675 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-08-18 15:28:57,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:57,688 INFO L225 Difference]: With dead ends: 57 [2020-08-18 15:28:57,688 INFO L226 Difference]: Without dead ends: 42 [2020-08-18 15:28:57,692 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 15:28:57,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-18 15:28:57,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2020-08-18 15:28:57,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 15:28:57,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 49 transitions. [2020-08-18 15:28:57,737 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 49 transitions. Word has length 15 [2020-08-18 15:28:57,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:57,738 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 49 transitions. [2020-08-18 15:28:57,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:28:57,739 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 49 transitions. [2020-08-18 15:28:57,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-18 15:28:57,740 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:57,740 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:57,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 15:28:57,741 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:57,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:57,741 INFO L82 PathProgramCache]: Analyzing trace with hash -493018308, now seen corresponding path program 1 times [2020-08-18 15:28:57,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:57,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881247472] [2020-08-18 15:28:57,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:57,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:57,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:57,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:57,792 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 15:28:57,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881247472] [2020-08-18 15:28:57,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:28:57,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:28:57,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688253244] [2020-08-18 15:28:57,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:28:57,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:57,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:28:57,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:57,797 INFO L87 Difference]: Start difference. First operand 30 states and 49 transitions. Second operand 3 states. [2020-08-18 15:28:57,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:57,827 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2020-08-18 15:28:57,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:28:57,828 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-08-18 15:28:57,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:57,829 INFO L225 Difference]: With dead ends: 67 [2020-08-18 15:28:57,830 INFO L226 Difference]: Without dead ends: 42 [2020-08-18 15:28:57,831 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 15:28:57,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-18 15:28:57,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-08-18 15:28:57,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-18 15:28:57,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 65 transitions. [2020-08-18 15:28:57,841 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 65 transitions. Word has length 15 [2020-08-18 15:28:57,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:57,842 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 65 transitions. [2020-08-18 15:28:57,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:28:57,842 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 65 transitions. [2020-08-18 15:28:57,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 15:28:57,843 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:57,843 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:57,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 15:28:57,844 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:57,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:57,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1216458266, now seen corresponding path program 1 times [2020-08-18 15:28:57,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:57,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439477215] [2020-08-18 15:28:57,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:57,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:57,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:57,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:57,888 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 15:28:57,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439477215] [2020-08-18 15:28:57,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:28:57,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:28:57,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799635843] [2020-08-18 15:28:57,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:28:57,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:57,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:28:57,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:57,892 INFO L87 Difference]: Start difference. First operand 40 states and 65 transitions. Second operand 3 states. [2020-08-18 15:28:57,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:57,921 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-08-18 15:28:57,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:28:57,922 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-18 15:28:57,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:57,924 INFO L225 Difference]: With dead ends: 63 [2020-08-18 15:28:57,924 INFO L226 Difference]: Without dead ends: 45 [2020-08-18 15:28:57,925 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 15:28:57,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-18 15:28:57,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2020-08-18 15:28:57,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-18 15:28:57,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 67 transitions. [2020-08-18 15:28:57,935 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 67 transitions. Word has length 16 [2020-08-18 15:28:57,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:57,937 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 67 transitions. [2020-08-18 15:28:57,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:28:57,937 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 67 transitions. [2020-08-18 15:28:57,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 15:28:57,938 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:57,938 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:57,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 15:28:57,940 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:57,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:57,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1896516636, now seen corresponding path program 1 times [2020-08-18 15:28:57,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:57,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192809251] [2020-08-18 15:28:57,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:57,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:58,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:58,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:58,029 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 15:28:58,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192809251] [2020-08-18 15:28:58,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:28:58,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:28:58,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212253781] [2020-08-18 15:28:58,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:28:58,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:58,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:28:58,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:58,034 INFO L87 Difference]: Start difference. First operand 43 states and 67 transitions. Second operand 3 states. [2020-08-18 15:28:58,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:58,080 INFO L93 Difference]: Finished difference Result 76 states and 120 transitions. [2020-08-18 15:28:58,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:28:58,080 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-18 15:28:58,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:58,083 INFO L225 Difference]: With dead ends: 76 [2020-08-18 15:28:58,083 INFO L226 Difference]: Without dead ends: 74 [2020-08-18 15:28:58,085 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 15:28:58,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-18 15:28:58,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2020-08-18 15:28:58,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-18 15:28:58,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 88 transitions. [2020-08-18 15:28:58,095 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 88 transitions. Word has length 16 [2020-08-18 15:28:58,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:58,096 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 88 transitions. [2020-08-18 15:28:58,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:28:58,096 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 88 transitions. [2020-08-18 15:28:58,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 15:28:58,097 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:58,097 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:28:58,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 15:28:58,098 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:58,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:58,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1087170010, now seen corresponding path program 1 times [2020-08-18 15:28:58,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:58,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889236352] [2020-08-18 15:28:58,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:58,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:58,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:58,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:58,137 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 15:28:58,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889236352] [2020-08-18 15:28:58,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:28:58,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:28:58,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068642911] [2020-08-18 15:28:58,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:28:58,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:58,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:28:58,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:58,139 INFO L87 Difference]: Start difference. First operand 56 states and 88 transitions. Second operand 3 states. [2020-08-18 15:28:58,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:58,165 INFO L93 Difference]: Finished difference Result 124 states and 198 transitions. [2020-08-18 15:28:58,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:28:58,165 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-18 15:28:58,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:58,167 INFO L225 Difference]: With dead ends: 124 [2020-08-18 15:28:58,167 INFO L226 Difference]: Without dead ends: 76 [2020-08-18 15:28:58,168 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 15:28:58,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-18 15:28:58,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-08-18 15:28:58,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-18 15:28:58,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 114 transitions. [2020-08-18 15:28:58,182 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 114 transitions. Word has length 16 [2020-08-18 15:28:58,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:58,182 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 114 transitions. [2020-08-18 15:28:58,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:28:58,182 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 114 transitions. [2020-08-18 15:28:58,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 15:28:58,184 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:58,184 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 15:28:58,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 15:28:58,184 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:58,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:58,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1337311087, now seen corresponding path program 1 times [2020-08-18 15:28:58,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:58,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657295643] [2020-08-18 15:28:58,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:58,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:58,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:58,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:58,223 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 15:28:58,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657295643] [2020-08-18 15:28:58,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:28:58,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:28:58,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979961318] [2020-08-18 15:28:58,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:28:58,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:58,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:28:58,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:58,231 INFO L87 Difference]: Start difference. First operand 74 states and 114 transitions. Second operand 3 states. [2020-08-18 15:28:58,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:58,264 INFO L93 Difference]: Finished difference Result 111 states and 169 transitions. [2020-08-18 15:28:58,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:28:58,265 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-18 15:28:58,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:58,266 INFO L225 Difference]: With dead ends: 111 [2020-08-18 15:28:58,266 INFO L226 Difference]: Without dead ends: 78 [2020-08-18 15:28:58,267 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 15:28:58,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-18 15:28:58,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-08-18 15:28:58,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-18 15:28:58,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 114 transitions. [2020-08-18 15:28:58,290 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 114 transitions. Word has length 17 [2020-08-18 15:28:58,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:58,291 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 114 transitions. [2020-08-18 15:28:58,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:28:58,295 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 114 transitions. [2020-08-18 15:28:58,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 15:28:58,299 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:58,299 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 15:28:58,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 15:28:58,300 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:58,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:58,300 INFO L82 PathProgramCache]: Analyzing trace with hash -657252717, now seen corresponding path program 1 times [2020-08-18 15:28:58,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:58,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037382285] [2020-08-18 15:28:58,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:58,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:58,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:58,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:58,379 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 15:28:58,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037382285] [2020-08-18 15:28:58,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:28:58,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:28:58,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85234174] [2020-08-18 15:28:58,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:28:58,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:58,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:28:58,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:58,382 INFO L87 Difference]: Start difference. First operand 76 states and 114 transitions. Second operand 3 states. [2020-08-18 15:28:58,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:58,402 INFO L93 Difference]: Finished difference Result 132 states and 200 transitions. [2020-08-18 15:28:58,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:28:58,403 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-18 15:28:58,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:58,404 INFO L225 Difference]: With dead ends: 132 [2020-08-18 15:28:58,404 INFO L226 Difference]: Without dead ends: 130 [2020-08-18 15:28:58,405 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 15:28:58,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-08-18 15:28:58,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 104. [2020-08-18 15:28:58,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-18 15:28:58,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 154 transitions. [2020-08-18 15:28:58,418 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 154 transitions. Word has length 17 [2020-08-18 15:28:58,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:58,419 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 154 transitions. [2020-08-18 15:28:58,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:28:58,419 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 154 transitions. [2020-08-18 15:28:58,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 15:28:58,420 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:58,421 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 15:28:58,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 15:28:58,421 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:58,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:58,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1466599343, now seen corresponding path program 1 times [2020-08-18 15:28:58,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:58,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208914929] [2020-08-18 15:28:58,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:58,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:58,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:58,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:58,451 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 15:28:58,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [208914929] [2020-08-18 15:28:58,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:28:58,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:28:58,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339896688] [2020-08-18 15:28:58,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:28:58,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:58,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:28:58,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:58,453 INFO L87 Difference]: Start difference. First operand 104 states and 154 transitions. Second operand 3 states. [2020-08-18 15:28:58,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:58,475 INFO L93 Difference]: Finished difference Result 232 states and 344 transitions. [2020-08-18 15:28:58,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:28:58,476 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-18 15:28:58,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:58,478 INFO L225 Difference]: With dead ends: 232 [2020-08-18 15:28:58,478 INFO L226 Difference]: Without dead ends: 138 [2020-08-18 15:28:58,479 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 15:28:58,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-18 15:28:58,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-08-18 15:28:58,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-18 15:28:58,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 194 transitions. [2020-08-18 15:28:58,494 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 194 transitions. Word has length 17 [2020-08-18 15:28:58,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:58,506 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 194 transitions. [2020-08-18 15:28:58,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:28:58,506 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 194 transitions. [2020-08-18 15:28:58,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 15:28:58,507 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:58,507 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 15:28:58,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 15:28:58,508 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:58,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:58,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1100217935, now seen corresponding path program 1 times [2020-08-18 15:28:58,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:58,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516585340] [2020-08-18 15:28:58,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:58,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:58,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:58,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:58,533 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 15:28:58,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516585340] [2020-08-18 15:28:58,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:28:58,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:28:58,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948298828] [2020-08-18 15:28:58,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:28:58,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:58,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:28:58,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:58,535 INFO L87 Difference]: Start difference. First operand 136 states and 194 transitions. Second operand 3 states. [2020-08-18 15:28:58,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:58,552 INFO L93 Difference]: Finished difference Result 204 states and 288 transitions. [2020-08-18 15:28:58,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:28:58,553 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 15:28:58,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:58,555 INFO L225 Difference]: With dead ends: 204 [2020-08-18 15:28:58,555 INFO L226 Difference]: Without dead ends: 142 [2020-08-18 15:28:58,556 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 15:28:58,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-08-18 15:28:58,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2020-08-18 15:28:58,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-18 15:28:58,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 194 transitions. [2020-08-18 15:28:58,570 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 194 transitions. Word has length 18 [2020-08-18 15:28:58,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:58,570 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 194 transitions. [2020-08-18 15:28:58,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:28:58,571 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 194 transitions. [2020-08-18 15:28:58,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 15:28:58,572 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:58,572 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 15:28:58,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 15:28:58,576 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:58,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:58,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1780276305, now seen corresponding path program 1 times [2020-08-18 15:28:58,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:58,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456085183] [2020-08-18 15:28:58,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:58,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:58,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:58,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:58,637 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 15:28:58,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456085183] [2020-08-18 15:28:58,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:28:58,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:28:58,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864782754] [2020-08-18 15:28:58,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:28:58,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:58,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:28:58,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:58,639 INFO L87 Difference]: Start difference. First operand 140 states and 194 transitions. Second operand 3 states. [2020-08-18 15:28:58,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:58,674 INFO L93 Difference]: Finished difference Result 236 states and 328 transitions. [2020-08-18 15:28:58,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:28:58,675 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 15:28:58,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:58,676 INFO L225 Difference]: With dead ends: 236 [2020-08-18 15:28:58,677 INFO L226 Difference]: Without dead ends: 234 [2020-08-18 15:28:58,677 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 15:28:58,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-08-18 15:28:58,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 200. [2020-08-18 15:28:58,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-18 15:28:58,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 270 transitions. [2020-08-18 15:28:58,690 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 270 transitions. Word has length 18 [2020-08-18 15:28:58,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:58,690 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 270 transitions. [2020-08-18 15:28:58,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:28:58,691 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 270 transitions. [2020-08-18 15:28:58,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 15:28:58,693 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:58,693 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 15:28:58,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 15:28:58,693 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:58,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:58,694 INFO L82 PathProgramCache]: Analyzing trace with hash 970929679, now seen corresponding path program 1 times [2020-08-18 15:28:58,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:58,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134444597] [2020-08-18 15:28:58,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:58,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:58,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:58,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:58,722 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 15:28:58,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134444597] [2020-08-18 15:28:58,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:28:58,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:28:58,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003778893] [2020-08-18 15:28:58,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:28:58,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:58,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:28:58,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:58,724 INFO L87 Difference]: Start difference. First operand 200 states and 270 transitions. Second operand 3 states. [2020-08-18 15:28:58,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:58,746 INFO L93 Difference]: Finished difference Result 444 states and 592 transitions. [2020-08-18 15:28:58,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:28:58,747 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 15:28:58,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:58,749 INFO L225 Difference]: With dead ends: 444 [2020-08-18 15:28:58,749 INFO L226 Difference]: Without dead ends: 258 [2020-08-18 15:28:58,750 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 15:28:58,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-08-18 15:28:58,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-08-18 15:28:58,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-18 15:28:58,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 326 transitions. [2020-08-18 15:28:58,781 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 326 transitions. Word has length 18 [2020-08-18 15:28:58,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:58,781 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 326 transitions. [2020-08-18 15:28:58,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:28:58,782 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 326 transitions. [2020-08-18 15:28:58,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 15:28:58,784 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:58,786 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 15:28:58,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 15:28:58,786 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:58,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:58,787 INFO L82 PathProgramCache]: Analyzing trace with hash -645793370, now seen corresponding path program 1 times [2020-08-18 15:28:58,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:58,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297576901] [2020-08-18 15:28:58,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:58,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:58,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:58,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:58,827 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 15:28:58,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297576901] [2020-08-18 15:28:58,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:28:58,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:28:58,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542781790] [2020-08-18 15:28:58,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:28:58,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:58,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:28:58,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:58,829 INFO L87 Difference]: Start difference. First operand 256 states and 326 transitions. Second operand 3 states. [2020-08-18 15:28:58,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:58,849 INFO L93 Difference]: Finished difference Result 384 states and 484 transitions. [2020-08-18 15:28:58,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:28:58,850 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 15:28:58,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:58,852 INFO L225 Difference]: With dead ends: 384 [2020-08-18 15:28:58,852 INFO L226 Difference]: Without dead ends: 266 [2020-08-18 15:28:58,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:58,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-08-18 15:28:58,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 264. [2020-08-18 15:28:58,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-08-18 15:28:58,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 326 transitions. [2020-08-18 15:28:58,866 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 326 transitions. Word has length 19 [2020-08-18 15:28:58,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:58,866 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 326 transitions. [2020-08-18 15:28:58,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:28:58,866 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 326 transitions. [2020-08-18 15:28:58,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 15:28:58,868 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:58,868 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 15:28:58,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 15:28:58,868 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:58,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:58,868 INFO L82 PathProgramCache]: Analyzing trace with hash 34265000, now seen corresponding path program 1 times [2020-08-18 15:28:58,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:58,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916440101] [2020-08-18 15:28:58,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:58,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:58,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:58,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:58,895 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 15:28:58,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916440101] [2020-08-18 15:28:58,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:28:58,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:28:58,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304796614] [2020-08-18 15:28:58,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:28:58,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:58,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:28:58,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:58,897 INFO L87 Difference]: Start difference. First operand 264 states and 326 transitions. Second operand 3 states. [2020-08-18 15:28:58,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:58,916 INFO L93 Difference]: Finished difference Result 426 states and 519 transitions. [2020-08-18 15:28:58,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:28:58,916 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 15:28:58,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:58,919 INFO L225 Difference]: With dead ends: 426 [2020-08-18 15:28:58,919 INFO L226 Difference]: Without dead ends: 424 [2020-08-18 15:28:58,920 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 15:28:58,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2020-08-18 15:28:58,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 392. [2020-08-18 15:28:58,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-08-18 15:28:58,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 470 transitions. [2020-08-18 15:28:58,934 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 470 transitions. Word has length 19 [2020-08-18 15:28:58,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:58,934 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 470 transitions. [2020-08-18 15:28:58,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:28:58,934 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 470 transitions. [2020-08-18 15:28:58,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 15:28:58,936 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:28:58,936 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 15:28:58,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 15:28:58,936 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:28:58,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:28:58,937 INFO L82 PathProgramCache]: Analyzing trace with hash -775081626, now seen corresponding path program 1 times [2020-08-18 15:28:58,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:28:58,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263900927] [2020-08-18 15:28:58,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:28:58,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:58,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:28:58,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:28:58,956 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 15:28:58,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263900927] [2020-08-18 15:28:58,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:28:58,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:28:58,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989985933] [2020-08-18 15:28:58,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:28:58,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:28:58,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:28:58,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:28:58,958 INFO L87 Difference]: Start difference. First operand 392 states and 470 transitions. Second operand 3 states. [2020-08-18 15:28:58,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:28:58,982 INFO L93 Difference]: Finished difference Result 856 states and 998 transitions. [2020-08-18 15:28:58,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:28:58,983 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 15:28:58,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:28:58,983 INFO L225 Difference]: With dead ends: 856 [2020-08-18 15:28:58,984 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 15:28:58,985 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 15:28:58,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 15:28:58,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 15:28:58,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 15:28:58,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 15:28:58,986 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-08-18 15:28:58,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:28:58,987 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 15:28:58,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:28:58,987 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 15:28:58,987 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 15:28:58,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 15:28:58,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 15:28:59,011 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 15:28:59,012 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 15:28:59,012 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 15:28:59,012 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 15:28:59,012 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 15:28:59,012 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 15:28:59,012 INFO L268 CegarLoopResult]: For program point L64(line 64) no Hoare annotation was computed. [2020-08-18 15:28:59,013 INFO L271 CegarLoopResult]: At program point L89(lines 5 93) the Hoare annotation is: true [2020-08-18 15:28:59,013 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 93) no Hoare annotation was computed. [2020-08-18 15:28:59,013 INFO L268 CegarLoopResult]: For program point L73-1(lines 24 88) no Hoare annotation was computed. [2020-08-18 15:28:59,013 INFO L268 CegarLoopResult]: For program point L69(line 69) no Hoare annotation was computed. [2020-08-18 15:28:59,013 INFO L268 CegarLoopResult]: For program point L57-1(lines 24 88) no Hoare annotation was computed. [2020-08-18 15:28:59,013 INFO L268 CegarLoopResult]: For program point L53-1(lines 24 88) no Hoare annotation was computed. [2020-08-18 15:28:59,013 INFO L268 CegarLoopResult]: For program point L49-1(lines 24 88) no Hoare annotation was computed. [2020-08-18 15:28:59,013 INFO L268 CegarLoopResult]: For program point L78-1(lines 24 88) no Hoare annotation was computed. [2020-08-18 15:28:59,014 INFO L268 CegarLoopResult]: For program point L45-1(lines 24 88) no Hoare annotation was computed. [2020-08-18 15:28:59,014 INFO L268 CegarLoopResult]: For program point L74(line 74) no Hoare annotation was computed. [2020-08-18 15:28:59,014 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-08-18 15:28:59,014 INFO L268 CegarLoopResult]: For program point L41-2(lines 24 88) no Hoare annotation was computed. [2020-08-18 15:28:59,014 INFO L271 CegarLoopResult]: At program point L83-1(lines 24 88) the Hoare annotation is: true [2020-08-18 15:28:59,014 INFO L268 CegarLoopResult]: For program point L79(line 79) no Hoare annotation was computed. [2020-08-18 15:28:59,014 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 93) no Hoare annotation was computed. [2020-08-18 15:28:59,015 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 91) no Hoare annotation was computed. [2020-08-18 15:28:59,015 INFO L268 CegarLoopResult]: For program point L63-1(lines 24 88) no Hoare annotation was computed. [2020-08-18 15:28:59,015 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 93) the Hoare annotation is: true [2020-08-18 15:28:59,015 INFO L268 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-08-18 15:28:59,015 INFO L268 CegarLoopResult]: For program point L84(line 84) no Hoare annotation was computed. [2020-08-18 15:28:59,015 INFO L264 CegarLoopResult]: At program point L84-1(lines 5 93) the Hoare annotation is: false [2020-08-18 15:28:59,015 INFO L268 CegarLoopResult]: For program point L68-1(lines 24 88) no Hoare annotation was computed. [2020-08-18 15:28:59,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 03:28:59 BoogieIcfgContainer [2020-08-18 15:28:59,027 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 15:28:59,029 INFO L168 Benchmark]: Toolchain (without parser) took 2525.36 ms. Allocated memory was 141.0 MB in the beginning and 234.9 MB in the end (delta: 93.8 MB). Free memory was 104.1 MB in the beginning and 142.2 MB in the end (delta: -38.1 MB). Peak memory consumption was 55.7 MB. Max. memory is 7.1 GB. [2020-08-18 15:28:59,030 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.1 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-08-18 15:28:59,031 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.07 ms. Allocated memory is still 141.0 MB. Free memory was 103.7 MB in the beginning and 93.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-08-18 15:28:59,032 INFO L168 Benchmark]: Boogie Preprocessor took 112.01 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 93.9 MB in the beginning and 182.4 MB in the end (delta: -88.5 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-18 15:28:59,033 INFO L168 Benchmark]: RCFGBuilder took 304.08 ms. Allocated memory is still 203.9 MB. Free memory was 182.4 MB in the beginning and 167.4 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. [2020-08-18 15:28:59,034 INFO L168 Benchmark]: TraceAbstraction took 1811.51 ms. Allocated memory was 203.9 MB in the beginning and 234.9 MB in the end (delta: 30.9 MB). Free memory was 166.5 MB in the beginning and 142.2 MB in the end (delta: 24.2 MB). Peak memory consumption was 55.2 MB. Max. memory is 7.1 GB. [2020-08-18 15:28:59,037 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.1 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 293.07 ms. Allocated memory is still 141.0 MB. Free memory was 103.7 MB in the beginning and 93.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.01 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 93.9 MB in the beginning and 182.4 MB in the end (delta: -88.5 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 304.08 ms. Allocated memory is still 203.9 MB. Free memory was 182.4 MB in the beginning and 167.4 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1811.51 ms. Allocated memory was 203.9 MB in the beginning and 234.9 MB in the end (delta: 30.9 MB). Free memory was 166.5 MB in the beginning and 142.2 MB in the end (delta: 24.2 MB). Peak memory consumption was 55.2 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: 1.6s, 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: 0.2s 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, 0.4s 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...