/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 14:07:42,023 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 14:07:42,027 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 14:07:42,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 14:07:42,072 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 14:07:42,085 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 14:07:42,087 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 14:07:42,090 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 14:07:42,093 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 14:07:42,095 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 14:07:42,098 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 14:07:42,101 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 14:07:42,101 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 14:07:42,105 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 14:07:42,108 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 14:07:42,110 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 14:07:42,112 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 14:07:42,113 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 14:07:42,115 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 14:07:42,122 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 14:07:42,126 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 14:07:42,127 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 14:07:42,128 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 14:07:42,129 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 14:07:42,134 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 14:07:42,145 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 14:07:42,146 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 14:07:42,148 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 14:07:42,149 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 14:07:42,190 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 14:07:42,191 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 14:07:42,193 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 14:07:42,193 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 14:07:42,193 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 14:07:42,194 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 14:07:42,194 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 14:07:42,194 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 14:07:42,194 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 14:07:42,195 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 14:07:42,196 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 14:07:42,196 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 14:07:42,196 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 14:07:42,197 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 14:07:42,197 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 14:07:42,197 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 14:07:42,197 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 14:07:42,197 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 14:07:42,198 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 14:07:42,198 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 14:07:42,198 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 14:07:42,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:07:42,198 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 14:07:42,199 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 14:07:42,199 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 14:07:42,199 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 14:07:42,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 14:07:42,199 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 14:07:42,200 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 14:07:42,200 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> log-additional-information=true; [2020-08-21 14:07:42,541 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 14:07:42,555 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 14:07:42,558 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 14:07:42,560 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 14:07:42,561 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 14:07:42,562 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_5.c [2020-08-21 14:07:42,633 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a3b17c318/65d50565cad04f4db34d0f50aaabc6f3/FLAGf78255fad [2020-08-21 14:07:43,137 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 14:07:43,138 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_5.c [2020-08-21 14:07:43,147 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a3b17c318/65d50565cad04f4db34d0f50aaabc6f3/FLAGf78255fad [2020-08-21 14:07:43,473 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a3b17c318/65d50565cad04f4db34d0f50aaabc6f3 [2020-08-21 14:07:43,482 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 14:07:43,484 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 14:07:43,485 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 14:07:43,485 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 14:07:43,488 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 14:07:43,489 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:07:43" (1/1) ... [2020-08-21 14:07:43,492 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75e37eeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:43, skipping insertion in model container [2020-08-21 14:07:43,493 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:07:43" (1/1) ... [2020-08-21 14:07:43,500 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 14:07:43,520 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 14:07:43,686 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:07:43,691 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 14:07:43,712 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:07:43,727 INFO L208 MainTranslator]: Completed translation [2020-08-21 14:07:43,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:43 WrapperNode [2020-08-21 14:07:43,728 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 14:07:43,729 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 14:07:43,729 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 14:07:43,729 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 14:07:43,741 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:43" (1/1) ... [2020-08-21 14:07:43,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:43" (1/1) ... [2020-08-21 14:07:43,827 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:43" (1/1) ... [2020-08-21 14:07:43,828 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:43" (1/1) ... [2020-08-21 14:07:43,832 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:43" (1/1) ... [2020-08-21 14:07:43,839 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:43" (1/1) ... [2020-08-21 14:07:43,843 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:43" (1/1) ... [2020-08-21 14:07:43,845 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 14:07:43,846 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 14:07:43,846 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 14:07:43,846 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 14:07:43,847 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:43" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:07:43,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 14:07:43,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 14:07:43,908 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 14:07:43,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 14:07:43,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 14:07:43,908 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 14:07:43,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 14:07:43,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 14:07:44,147 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 14:07:44,148 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 14:07:44,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:07:44 BoogieIcfgContainer [2020-08-21 14:07:44,152 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 14:07:44,154 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 14:07:44,154 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 14:07:44,158 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 14:07:44,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 02:07:43" (1/3) ... [2020-08-21 14:07:44,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bbe0040 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:07:44, skipping insertion in model container [2020-08-21 14:07:44,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:43" (2/3) ... [2020-08-21 14:07:44,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bbe0040 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:07:44, skipping insertion in model container [2020-08-21 14:07:44,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:07:44" (3/3) ... [2020-08-21 14:07:44,161 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_5.c [2020-08-21 14:07:44,173 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 14:07:44,181 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 14:07:44,196 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 14:07:44,223 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 14:07:44,224 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 14:07:44,224 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 14:07:44,225 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 14:07:44,225 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 14:07:44,225 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 14:07:44,226 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 14:07:44,226 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 14:07:44,259 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-08-21 14:07:44,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-21 14:07:44,267 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:44,269 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:07:44,269 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:44,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:44,292 INFO L82 PathProgramCache]: Analyzing trace with hash 316328318, now seen corresponding path program 1 times [2020-08-21 14:07:44,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:44,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263041273] [2020-08-21 14:07:44,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:44,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:44,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:44,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:44,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:44,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263041273] [2020-08-21 14:07:44,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:44,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:44,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353981981] [2020-08-21 14:07:44,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:44,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:44,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:44,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:44,534 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-08-21 14:07:44,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:44,609 INFO L93 Difference]: Finished difference Result 57 states and 90 transitions. [2020-08-21 14:07:44,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:44,611 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-08-21 14:07:44,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:44,623 INFO L225 Difference]: With dead ends: 57 [2020-08-21 14:07:44,624 INFO L226 Difference]: Without dead ends: 42 [2020-08-21 14:07:44,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:44,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-21 14:07:44,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2020-08-21 14:07:44,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 14:07:44,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 49 transitions. [2020-08-21 14:07:44,677 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 49 transitions. Word has length 15 [2020-08-21 14:07:44,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:44,677 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 49 transitions. [2020-08-21 14:07:44,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:44,678 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 49 transitions. [2020-08-21 14:07:44,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-21 14:07:44,679 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:44,679 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:07:44,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 14:07:44,680 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:44,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:44,681 INFO L82 PathProgramCache]: Analyzing trace with hash -493018308, now seen corresponding path program 1 times [2020-08-21 14:07:44,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:44,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106603103] [2020-08-21 14:07:44,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:44,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:44,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:44,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:44,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:44,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106603103] [2020-08-21 14:07:44,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:44,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:44,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796864110] [2020-08-21 14:07:44,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:44,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:44,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:44,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:44,754 INFO L87 Difference]: Start difference. First operand 30 states and 49 transitions. Second operand 3 states. [2020-08-21 14:07:44,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:44,782 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2020-08-21 14:07:44,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:44,783 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-08-21 14:07:44,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:44,784 INFO L225 Difference]: With dead ends: 67 [2020-08-21 14:07:44,785 INFO L226 Difference]: Without dead ends: 42 [2020-08-21 14:07:44,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:44,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-21 14:07:44,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-08-21 14:07:44,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-21 14:07:44,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 65 transitions. [2020-08-21 14:07:44,795 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 65 transitions. Word has length 15 [2020-08-21 14:07:44,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:44,795 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 65 transitions. [2020-08-21 14:07:44,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:44,796 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 65 transitions. [2020-08-21 14:07:44,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 14:07:44,797 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:44,797 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:07:44,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 14:07:44,797 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:44,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:44,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1216458266, now seen corresponding path program 1 times [2020-08-21 14:07:44,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:44,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566388923] [2020-08-21 14:07:44,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:44,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:44,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:44,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:44,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:44,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566388923] [2020-08-21 14:07:44,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:44,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:44,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509398733] [2020-08-21 14:07:44,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:44,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:44,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:44,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:44,842 INFO L87 Difference]: Start difference. First operand 40 states and 65 transitions. Second operand 3 states. [2020-08-21 14:07:44,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:44,865 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-08-21 14:07:44,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:44,866 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-21 14:07:44,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:44,868 INFO L225 Difference]: With dead ends: 63 [2020-08-21 14:07:44,868 INFO L226 Difference]: Without dead ends: 45 [2020-08-21 14:07:44,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:44,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-21 14:07:44,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2020-08-21 14:07:44,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-21 14:07:44,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 67 transitions. [2020-08-21 14:07:44,877 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 67 transitions. Word has length 16 [2020-08-21 14:07:44,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:44,878 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 67 transitions. [2020-08-21 14:07:44,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:44,878 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 67 transitions. [2020-08-21 14:07:44,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 14:07:44,879 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:44,879 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:07:44,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 14:07:44,880 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:44,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:44,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1896516636, now seen corresponding path program 1 times [2020-08-21 14:07:44,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:44,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659920879] [2020-08-21 14:07:44,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:44,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:44,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:44,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:44,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:44,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659920879] [2020-08-21 14:07:44,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:44,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:44,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31288710] [2020-08-21 14:07:44,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:44,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:44,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:44,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:44,919 INFO L87 Difference]: Start difference. First operand 43 states and 67 transitions. Second operand 3 states. [2020-08-21 14:07:44,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:44,939 INFO L93 Difference]: Finished difference Result 76 states and 120 transitions. [2020-08-21 14:07:44,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:44,940 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-21 14:07:44,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:44,942 INFO L225 Difference]: With dead ends: 76 [2020-08-21 14:07:44,942 INFO L226 Difference]: Without dead ends: 74 [2020-08-21 14:07:44,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:44,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-21 14:07:44,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2020-08-21 14:07:44,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-21 14:07:44,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 88 transitions. [2020-08-21 14:07:44,954 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 88 transitions. Word has length 16 [2020-08-21 14:07:44,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:44,954 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 88 transitions. [2020-08-21 14:07:44,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:44,955 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 88 transitions. [2020-08-21 14:07:44,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 14:07:44,956 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:44,956 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:07:44,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 14:07:44,956 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:44,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:44,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1087170010, now seen corresponding path program 1 times [2020-08-21 14:07:44,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:44,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450306977] [2020-08-21 14:07:44,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:44,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:44,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:44,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:44,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:44,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450306977] [2020-08-21 14:07:44,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:44,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:44,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045281635] [2020-08-21 14:07:44,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:44,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:44,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:44,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:44,998 INFO L87 Difference]: Start difference. First operand 56 states and 88 transitions. Second operand 3 states. [2020-08-21 14:07:45,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:45,020 INFO L93 Difference]: Finished difference Result 124 states and 198 transitions. [2020-08-21 14:07:45,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:45,021 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-21 14:07:45,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:45,022 INFO L225 Difference]: With dead ends: 124 [2020-08-21 14:07:45,022 INFO L226 Difference]: Without dead ends: 76 [2020-08-21 14:07:45,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:45,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-21 14:07:45,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-08-21 14:07:45,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-21 14:07:45,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 114 transitions. [2020-08-21 14:07:45,034 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 114 transitions. Word has length 16 [2020-08-21 14:07:45,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:45,034 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 114 transitions. [2020-08-21 14:07:45,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:45,035 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 114 transitions. [2020-08-21 14:07:45,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-21 14:07:45,036 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:45,036 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:07:45,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 14:07:45,036 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:45,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:45,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1337311087, now seen corresponding path program 1 times [2020-08-21 14:07:45,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:45,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325061587] [2020-08-21 14:07:45,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:45,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:45,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:45,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:45,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:45,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325061587] [2020-08-21 14:07:45,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:45,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:45,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292070210] [2020-08-21 14:07:45,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:45,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:45,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:45,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:45,089 INFO L87 Difference]: Start difference. First operand 74 states and 114 transitions. Second operand 3 states. [2020-08-21 14:07:45,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:45,117 INFO L93 Difference]: Finished difference Result 111 states and 169 transitions. [2020-08-21 14:07:45,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:45,117 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-21 14:07:45,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:45,119 INFO L225 Difference]: With dead ends: 111 [2020-08-21 14:07:45,119 INFO L226 Difference]: Without dead ends: 78 [2020-08-21 14:07:45,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:45,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-21 14:07:45,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-08-21 14:07:45,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-21 14:07:45,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 114 transitions. [2020-08-21 14:07:45,132 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 114 transitions. Word has length 17 [2020-08-21 14:07:45,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:45,132 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 114 transitions. [2020-08-21 14:07:45,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:45,133 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 114 transitions. [2020-08-21 14:07:45,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-21 14:07:45,133 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:45,134 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:07:45,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 14:07:45,134 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:45,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:45,134 INFO L82 PathProgramCache]: Analyzing trace with hash -657252717, now seen corresponding path program 1 times [2020-08-21 14:07:45,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:45,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817327427] [2020-08-21 14:07:45,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:45,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:45,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:45,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:45,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:45,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817327427] [2020-08-21 14:07:45,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:45,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:45,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521878201] [2020-08-21 14:07:45,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:45,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:45,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:45,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:45,203 INFO L87 Difference]: Start difference. First operand 76 states and 114 transitions. Second operand 3 states. [2020-08-21 14:07:45,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:45,228 INFO L93 Difference]: Finished difference Result 132 states and 200 transitions. [2020-08-21 14:07:45,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:45,229 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-21 14:07:45,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:45,231 INFO L225 Difference]: With dead ends: 132 [2020-08-21 14:07:45,231 INFO L226 Difference]: Without dead ends: 130 [2020-08-21 14:07:45,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:45,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-08-21 14:07:45,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 104. [2020-08-21 14:07:45,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-21 14:07:45,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 154 transitions. [2020-08-21 14:07:45,245 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 154 transitions. Word has length 17 [2020-08-21 14:07:45,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:45,246 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 154 transitions. [2020-08-21 14:07:45,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:45,246 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 154 transitions. [2020-08-21 14:07:45,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-21 14:07:45,247 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:45,248 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:07:45,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 14:07:45,248 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:45,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:45,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1466599343, now seen corresponding path program 1 times [2020-08-21 14:07:45,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:45,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048318080] [2020-08-21 14:07:45,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:45,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:45,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:45,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:45,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048318080] [2020-08-21 14:07:45,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:45,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:45,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735503322] [2020-08-21 14:07:45,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:45,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:45,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:45,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:45,284 INFO L87 Difference]: Start difference. First operand 104 states and 154 transitions. Second operand 3 states. [2020-08-21 14:07:45,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:45,306 INFO L93 Difference]: Finished difference Result 232 states and 344 transitions. [2020-08-21 14:07:45,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:45,307 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-21 14:07:45,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:45,309 INFO L225 Difference]: With dead ends: 232 [2020-08-21 14:07:45,309 INFO L226 Difference]: Without dead ends: 138 [2020-08-21 14:07:45,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:45,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-21 14:07:45,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-08-21 14:07:45,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-21 14:07:45,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 194 transitions. [2020-08-21 14:07:45,342 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 194 transitions. Word has length 17 [2020-08-21 14:07:45,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:45,342 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 194 transitions. [2020-08-21 14:07:45,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:45,342 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 194 transitions. [2020-08-21 14:07:45,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 14:07:45,344 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:45,344 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:07:45,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 14:07:45,345 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:45,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:45,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1100217935, now seen corresponding path program 1 times [2020-08-21 14:07:45,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:45,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029795631] [2020-08-21 14:07:45,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:45,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:45,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:45,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:45,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:45,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029795631] [2020-08-21 14:07:45,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:45,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:45,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793073761] [2020-08-21 14:07:45,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:45,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:45,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:45,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:45,372 INFO L87 Difference]: Start difference. First operand 136 states and 194 transitions. Second operand 3 states. [2020-08-21 14:07:45,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:45,390 INFO L93 Difference]: Finished difference Result 204 states and 288 transitions. [2020-08-21 14:07:45,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:45,391 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 14:07:45,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:45,392 INFO L225 Difference]: With dead ends: 204 [2020-08-21 14:07:45,392 INFO L226 Difference]: Without dead ends: 142 [2020-08-21 14:07:45,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:45,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-08-21 14:07:45,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2020-08-21 14:07:45,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-21 14:07:45,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 194 transitions. [2020-08-21 14:07:45,407 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 194 transitions. Word has length 18 [2020-08-21 14:07:45,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:45,407 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 194 transitions. [2020-08-21 14:07:45,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:45,407 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 194 transitions. [2020-08-21 14:07:45,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 14:07:45,409 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:45,409 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:07:45,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 14:07:45,410 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:45,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:45,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1780276305, now seen corresponding path program 1 times [2020-08-21 14:07:45,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:45,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681100950] [2020-08-21 14:07:45,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:45,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:45,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:45,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:45,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:45,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681100950] [2020-08-21 14:07:45,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:45,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:45,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176686410] [2020-08-21 14:07:45,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:45,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:45,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:45,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:45,445 INFO L87 Difference]: Start difference. First operand 140 states and 194 transitions. Second operand 3 states. [2020-08-21 14:07:45,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:45,466 INFO L93 Difference]: Finished difference Result 236 states and 328 transitions. [2020-08-21 14:07:45,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:45,467 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 14:07:45,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:45,469 INFO L225 Difference]: With dead ends: 236 [2020-08-21 14:07:45,469 INFO L226 Difference]: Without dead ends: 234 [2020-08-21 14:07:45,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:45,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-08-21 14:07:45,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 200. [2020-08-21 14:07:45,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-21 14:07:45,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 270 transitions. [2020-08-21 14:07:45,485 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 270 transitions. Word has length 18 [2020-08-21 14:07:45,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:45,486 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 270 transitions. [2020-08-21 14:07:45,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:45,486 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 270 transitions. [2020-08-21 14:07:45,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 14:07:45,488 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:45,488 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:07:45,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 14:07:45,488 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:45,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:45,489 INFO L82 PathProgramCache]: Analyzing trace with hash 970929679, now seen corresponding path program 1 times [2020-08-21 14:07:45,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:45,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275836867] [2020-08-21 14:07:45,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:45,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:45,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:45,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:45,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:45,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275836867] [2020-08-21 14:07:45,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:45,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:45,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17986798] [2020-08-21 14:07:45,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:45,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:45,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:45,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:45,549 INFO L87 Difference]: Start difference. First operand 200 states and 270 transitions. Second operand 3 states. [2020-08-21 14:07:45,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:45,589 INFO L93 Difference]: Finished difference Result 444 states and 592 transitions. [2020-08-21 14:07:45,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:45,590 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 14:07:45,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:45,592 INFO L225 Difference]: With dead ends: 444 [2020-08-21 14:07:45,592 INFO L226 Difference]: Without dead ends: 258 [2020-08-21 14:07:45,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:45,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-08-21 14:07:45,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-08-21 14:07:45,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-21 14:07:45,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 326 transitions. [2020-08-21 14:07:45,610 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 326 transitions. Word has length 18 [2020-08-21 14:07:45,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:45,611 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 326 transitions. [2020-08-21 14:07:45,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:45,611 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 326 transitions. [2020-08-21 14:07:45,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 14:07:45,613 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:45,613 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:07:45,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 14:07:45,614 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:45,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:45,614 INFO L82 PathProgramCache]: Analyzing trace with hash -645793370, now seen corresponding path program 1 times [2020-08-21 14:07:45,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:45,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873742071] [2020-08-21 14:07:45,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:45,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:45,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:45,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:45,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:45,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873742071] [2020-08-21 14:07:45,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:45,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:45,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373344838] [2020-08-21 14:07:45,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:45,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:45,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:45,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:45,642 INFO L87 Difference]: Start difference. First operand 256 states and 326 transitions. Second operand 3 states. [2020-08-21 14:07:45,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:45,662 INFO L93 Difference]: Finished difference Result 384 states and 484 transitions. [2020-08-21 14:07:45,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:45,662 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 14:07:45,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:45,664 INFO L225 Difference]: With dead ends: 384 [2020-08-21 14:07:45,664 INFO L226 Difference]: Without dead ends: 266 [2020-08-21 14:07:45,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:45,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-08-21 14:07:45,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 264. [2020-08-21 14:07:45,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-08-21 14:07:45,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 326 transitions. [2020-08-21 14:07:45,679 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 326 transitions. Word has length 19 [2020-08-21 14:07:45,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:45,679 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 326 transitions. [2020-08-21 14:07:45,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:45,679 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 326 transitions. [2020-08-21 14:07:45,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 14:07:45,681 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:45,681 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:07:45,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 14:07:45,682 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:45,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:45,682 INFO L82 PathProgramCache]: Analyzing trace with hash 34265000, now seen corresponding path program 1 times [2020-08-21 14:07:45,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:45,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373544176] [2020-08-21 14:07:45,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:45,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:45,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:45,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:45,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:45,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373544176] [2020-08-21 14:07:45,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:45,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:45,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837578527] [2020-08-21 14:07:45,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:45,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:45,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:45,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:45,705 INFO L87 Difference]: Start difference. First operand 264 states and 326 transitions. Second operand 3 states. [2020-08-21 14:07:45,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:45,726 INFO L93 Difference]: Finished difference Result 426 states and 519 transitions. [2020-08-21 14:07:45,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:45,726 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 14:07:45,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:45,729 INFO L225 Difference]: With dead ends: 426 [2020-08-21 14:07:45,729 INFO L226 Difference]: Without dead ends: 424 [2020-08-21 14:07:45,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:45,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2020-08-21 14:07:45,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 392. [2020-08-21 14:07:45,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-08-21 14:07:45,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 470 transitions. [2020-08-21 14:07:45,745 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 470 transitions. Word has length 19 [2020-08-21 14:07:45,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:45,746 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 470 transitions. [2020-08-21 14:07:45,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:45,746 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 470 transitions. [2020-08-21 14:07:45,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 14:07:45,747 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:45,747 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:07:45,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 14:07:45,748 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:45,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:45,748 INFO L82 PathProgramCache]: Analyzing trace with hash -775081626, now seen corresponding path program 1 times [2020-08-21 14:07:45,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:45,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776148694] [2020-08-21 14:07:45,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:45,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:45,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:45,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:45,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:45,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776148694] [2020-08-21 14:07:45,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:45,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:07:45,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170139774] [2020-08-21 14:07:45,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:07:45,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:45,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:07:45,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:45,771 INFO L87 Difference]: Start difference. First operand 392 states and 470 transitions. Second operand 3 states. [2020-08-21 14:07:45,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:45,796 INFO L93 Difference]: Finished difference Result 856 states and 998 transitions. [2020-08-21 14:07:45,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:07:45,796 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 14:07:45,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:45,797 INFO L225 Difference]: With dead ends: 856 [2020-08-21 14:07:45,797 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 14:07:45,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:07:45,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 14:07:45,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 14:07:45,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 14:07:45,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 14:07:45,800 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-08-21 14:07:45,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:45,801 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 14:07:45,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:07:45,801 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 14:07:45,801 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 14:07:45,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 14:07:45,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 14:07:45,826 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 14:07:45,826 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 14:07:45,826 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 14:07:45,826 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 14:07:45,826 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 14:07:45,827 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 14:07:45,827 INFO L268 CegarLoopResult]: For program point L64(line 64) no Hoare annotation was computed. [2020-08-21 14:07:45,827 INFO L271 CegarLoopResult]: At program point L89(lines 5 93) the Hoare annotation is: true [2020-08-21 14:07:45,827 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 93) no Hoare annotation was computed. [2020-08-21 14:07:45,827 INFO L268 CegarLoopResult]: For program point L73-1(lines 24 88) no Hoare annotation was computed. [2020-08-21 14:07:45,827 INFO L268 CegarLoopResult]: For program point L69(line 69) no Hoare annotation was computed. [2020-08-21 14:07:45,828 INFO L268 CegarLoopResult]: For program point L57-1(lines 24 88) no Hoare annotation was computed. [2020-08-21 14:07:45,828 INFO L268 CegarLoopResult]: For program point L53-1(lines 24 88) no Hoare annotation was computed. [2020-08-21 14:07:45,828 INFO L268 CegarLoopResult]: For program point L49-1(lines 24 88) no Hoare annotation was computed. [2020-08-21 14:07:45,828 INFO L268 CegarLoopResult]: For program point L78-1(lines 24 88) no Hoare annotation was computed. [2020-08-21 14:07:45,828 INFO L268 CegarLoopResult]: For program point L45-1(lines 24 88) no Hoare annotation was computed. [2020-08-21 14:07:45,828 INFO L268 CegarLoopResult]: For program point L74(line 74) no Hoare annotation was computed. [2020-08-21 14:07:45,828 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-08-21 14:07:45,829 INFO L268 CegarLoopResult]: For program point L41-2(lines 24 88) no Hoare annotation was computed. [2020-08-21 14:07:45,829 INFO L271 CegarLoopResult]: At program point L83-1(lines 24 88) the Hoare annotation is: true [2020-08-21 14:07:45,829 INFO L268 CegarLoopResult]: For program point L79(line 79) no Hoare annotation was computed. [2020-08-21 14:07:45,829 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 93) no Hoare annotation was computed. [2020-08-21 14:07:45,829 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 91) no Hoare annotation was computed. [2020-08-21 14:07:45,829 INFO L268 CegarLoopResult]: For program point L63-1(lines 24 88) no Hoare annotation was computed. [2020-08-21 14:07:45,830 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 93) the Hoare annotation is: true [2020-08-21 14:07:45,830 INFO L268 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-08-21 14:07:45,830 INFO L268 CegarLoopResult]: For program point L84(line 84) no Hoare annotation was computed. [2020-08-21 14:07:45,830 INFO L264 CegarLoopResult]: At program point L84-1(lines 5 93) the Hoare annotation is: false [2020-08-21 14:07:45,830 INFO L268 CegarLoopResult]: For program point L68-1(lines 24 88) no Hoare annotation was computed. [2020-08-21 14:07:45,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 02:07:45 BoogieIcfgContainer [2020-08-21 14:07:45,843 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 14:07:45,846 INFO L168 Benchmark]: Toolchain (without parser) took 2361.52 ms. Allocated memory was 141.0 MB in the beginning and 234.9 MB in the end (delta: 93.8 MB). Free memory was 104.3 MB in the beginning and 142.1 MB in the end (delta: -37.8 MB). Peak memory consumption was 56.0 MB. Max. memory is 7.1 GB. [2020-08-21 14:07:45,847 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 122.4 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-21 14:07:45,847 INFO L168 Benchmark]: CACSL2BoogieTranslator took 243.47 ms. Allocated memory is still 141.0 MB. Free memory was 104.1 MB in the beginning and 94.0 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-08-21 14:07:45,848 INFO L168 Benchmark]: Boogie Preprocessor took 117.12 ms. Allocated memory was 141.0 MB in the beginning and 202.4 MB in the end (delta: 61.3 MB). Free memory was 94.0 MB in the beginning and 180.5 MB in the end (delta: -86.5 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-08-21 14:07:45,849 INFO L168 Benchmark]: RCFGBuilder took 306.52 ms. Allocated memory is still 202.4 MB. Free memory was 180.5 MB in the beginning and 165.8 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. [2020-08-21 14:07:45,850 INFO L168 Benchmark]: TraceAbstraction took 1689.07 ms. Allocated memory was 202.4 MB in the beginning and 234.9 MB in the end (delta: 32.5 MB). Free memory was 165.1 MB in the beginning and 142.1 MB in the end (delta: 23.0 MB). Peak memory consumption was 55.5 MB. Max. memory is 7.1 GB. [2020-08-21 14:07:45,853 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 122.4 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 243.47 ms. Allocated memory is still 141.0 MB. Free memory was 104.1 MB in the beginning and 94.0 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.12 ms. Allocated memory was 141.0 MB in the beginning and 202.4 MB in the end (delta: 61.3 MB). Free memory was 94.0 MB in the beginning and 180.5 MB in the end (delta: -86.5 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 306.52 ms. Allocated memory is still 202.4 MB. Free memory was 180.5 MB in the beginning and 165.8 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1689.07 ms. Allocated memory was 202.4 MB in the beginning and 234.9 MB in the end (delta: 32.5 MB). Free memory was 165.1 MB in the beginning and 142.1 MB in the end (delta: 23.0 MB). Peak memory consumption was 55.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 91]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.5s, OverallIterations: 14, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 654 SDtfs, 285 SDslu, 428 SDs, 0 SdLazy, 75 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=392occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 138 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 42 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 240 NumberOfCodeBlocks, 240 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 226 ConstructedInterpolants, 0 QuantifiedInterpolants, 6424 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...