/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 interpolation-heuristic=FIRST --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_8.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 14:56:01,122 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 14:56:01,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 14:56:01,172 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 14:56:01,172 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 14:56:01,173 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 14:56:01,175 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 14:56:01,177 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 14:56:01,178 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 14:56:01,179 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 14:56:01,180 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 14:56:01,181 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 14:56:01,182 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 14:56:01,183 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 14:56:01,184 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 14:56:01,185 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 14:56:01,186 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 14:56:01,187 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 14:56:01,189 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 14:56:01,191 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 14:56:01,193 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 14:56:01,194 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 14:56:01,195 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 14:56:01,196 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 14:56:01,198 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 14:56:01,207 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 14:56:01,208 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 14:56:01,209 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 14:56:01,209 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 14:56:01,232 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 14:56:01,232 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 14:56:01,233 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 14:56:01,234 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 14:56:01,234 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 14:56:01,234 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 14:56:01,234 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 14:56:01,234 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 14:56:01,235 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 14:56:01,235 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 14:56:01,235 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 14:56:01,235 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 14:56:01,235 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 14:56:01,235 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 14:56:01,236 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 14:56:01,236 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 14:56:01,236 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 14:56:01,236 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 14:56:01,236 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 14:56:01,237 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 14:56:01,237 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 14:56:01,237 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:56:01,237 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 14:56:01,237 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 14:56:01,238 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 14:56:01,238 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 14:56:01,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 14:56:01,238 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 14:56:01,238 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 14:56:01,239 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 -> interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; [2020-08-21 14:56:01,547 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 14:56:01,560 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 14:56:01,563 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 14:56:01,565 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 14:56:01,565 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 14:56:01,566 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_8.c [2020-08-21 14:56:01,627 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0e620be40/bbba51220c3d40dd85d3982d26782169/FLAG67974ddba [2020-08-21 14:56:02,093 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 14:56:02,094 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_8.c [2020-08-21 14:56:02,103 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0e620be40/bbba51220c3d40dd85d3982d26782169/FLAG67974ddba [2020-08-21 14:56:02,476 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0e620be40/bbba51220c3d40dd85d3982d26782169 [2020-08-21 14:56:02,484 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 14:56:02,486 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 14:56:02,487 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 14:56:02,487 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 14:56:02,491 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 14:56:02,492 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:56:02" (1/1) ... [2020-08-21 14:56:02,495 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ecced43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:02, skipping insertion in model container [2020-08-21 14:56:02,495 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:56:02" (1/1) ... [2020-08-21 14:56:02,503 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 14:56:02,529 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 14:56:02,707 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:56:02,712 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 14:56:02,739 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:56:02,754 INFO L208 MainTranslator]: Completed translation [2020-08-21 14:56:02,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:02 WrapperNode [2020-08-21 14:56:02,755 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 14:56:02,756 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 14:56:02,756 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 14:56:02,756 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 14:56:02,853 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:02" (1/1) ... [2020-08-21 14:56:02,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:02" (1/1) ... [2020-08-21 14:56:02,860 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:02" (1/1) ... [2020-08-21 14:56:02,861 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:02" (1/1) ... [2020-08-21 14:56:02,875 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:02" (1/1) ... [2020-08-21 14:56:02,887 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:02" (1/1) ... [2020-08-21 14:56:02,888 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:02" (1/1) ... [2020-08-21 14:56:02,891 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 14:56:02,891 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 14:56:02,891 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 14:56:02,892 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 14:56:02,893 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:02" (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 14:56:02,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 14:56:02,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 14:56:02,965 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 14:56:02,965 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 14:56:02,965 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 14:56:02,965 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 14:56:02,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 14:56:02,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 14:56:03,252 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 14:56:03,253 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 14:56:03,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:56:03 BoogieIcfgContainer [2020-08-21 14:56:03,258 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 14:56:03,260 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 14:56:03,260 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 14:56:03,264 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 14:56:03,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 02:56:02" (1/3) ... [2020-08-21 14:56:03,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5871c653 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:56:03, skipping insertion in model container [2020-08-21 14:56:03,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:56:02" (2/3) ... [2020-08-21 14:56:03,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5871c653 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:56:03, skipping insertion in model container [2020-08-21 14:56:03,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:56:03" (3/3) ... [2020-08-21 14:56:03,270 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_8.c [2020-08-21 14:56:03,284 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 14:56:03,293 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 14:56:03,311 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 14:56:03,342 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 14:56:03,342 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 14:56:03,342 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 14:56:03,342 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 14:56:03,343 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 14:56:03,343 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 14:56:03,343 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 14:56:03,343 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 14:56:03,367 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-08-21 14:56:03,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 14:56:03,374 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:03,376 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 14:56:03,376 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:03,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:03,388 INFO L82 PathProgramCache]: Analyzing trace with hash 577441593, now seen corresponding path program 1 times [2020-08-21 14:56:03,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:03,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678313075] [2020-08-21 14:56:03,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:03,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:03,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:03,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:03,618 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 14:56:03,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678313075] [2020-08-21 14:56:03,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:03,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:56:03,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283858450] [2020-08-21 14:56:03,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:56:03,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:03,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:56:03,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:03,653 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-08-21 14:56:03,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:03,774 INFO L93 Difference]: Finished difference Result 75 states and 126 transitions. [2020-08-21 14:56:03,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:56:03,779 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 14:56:03,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:03,800 INFO L225 Difference]: With dead ends: 75 [2020-08-21 14:56:03,801 INFO L226 Difference]: Without dead ends: 60 [2020-08-21 14:56:03,811 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 14:56:03,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-21 14:56:03,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2020-08-21 14:56:03,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 14:56:03,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 73 transitions. [2020-08-21 14:56:03,879 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 73 transitions. Word has length 18 [2020-08-21 14:56:03,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:03,880 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 73 transitions. [2020-08-21 14:56:03,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:03,881 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 73 transitions. [2020-08-21 14:56:03,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 14:56:03,883 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:03,886 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 14:56:03,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 14:56:03,887 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:03,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:03,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1278506171, now seen corresponding path program 1 times [2020-08-21 14:56:03,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:03,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115683112] [2020-08-21 14:56:03,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:03,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:03,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:03,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:03,977 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 14:56:03,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [115683112] [2020-08-21 14:56:03,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:03,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:56:03,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173943126] [2020-08-21 14:56:03,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:56:03,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:03,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:56:03,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:03,982 INFO L87 Difference]: Start difference. First operand 42 states and 73 transitions. Second operand 3 states. [2020-08-21 14:56:04,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:04,011 INFO L93 Difference]: Finished difference Result 97 states and 172 transitions. [2020-08-21 14:56:04,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:56:04,012 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 14:56:04,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:04,013 INFO L225 Difference]: With dead ends: 97 [2020-08-21 14:56:04,013 INFO L226 Difference]: Without dead ends: 60 [2020-08-21 14:56:04,015 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 14:56:04,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-21 14:56:04,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-08-21 14:56:04,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-21 14:56:04,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 101 transitions. [2020-08-21 14:56:04,025 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 101 transitions. Word has length 18 [2020-08-21 14:56:04,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:04,025 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 101 transitions. [2020-08-21 14:56:04,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:04,026 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 101 transitions. [2020-08-21 14:56:04,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 14:56:04,026 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:04,027 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 14:56:04,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 14:56:04,027 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:04,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:04,028 INFO L82 PathProgramCache]: Analyzing trace with hash 721034227, now seen corresponding path program 1 times [2020-08-21 14:56:04,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:04,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518614748] [2020-08-21 14:56:04,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:04,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:04,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:04,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:04,087 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 14:56:04,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518614748] [2020-08-21 14:56:04,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:04,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:56:04,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164155818] [2020-08-21 14:56:04,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:56:04,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:04,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:56:04,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:04,091 INFO L87 Difference]: Start difference. First operand 58 states and 101 transitions. Second operand 3 states. [2020-08-21 14:56:04,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:04,134 INFO L93 Difference]: Finished difference Result 90 states and 153 transitions. [2020-08-21 14:56:04,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:56:04,135 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 14:56:04,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:04,136 INFO L225 Difference]: With dead ends: 90 [2020-08-21 14:56:04,137 INFO L226 Difference]: Without dead ends: 63 [2020-08-21 14:56:04,138 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 14:56:04,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-21 14:56:04,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-08-21 14:56:04,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-21 14:56:04,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 103 transitions. [2020-08-21 14:56:04,148 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 103 transitions. Word has length 19 [2020-08-21 14:56:04,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:04,148 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 103 transitions. [2020-08-21 14:56:04,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:04,149 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 103 transitions. [2020-08-21 14:56:04,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 14:56:04,150 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:04,150 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 14:56:04,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 14:56:04,150 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:04,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:04,151 INFO L82 PathProgramCache]: Analyzing trace with hash 979199665, now seen corresponding path program 1 times [2020-08-21 14:56:04,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:04,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152222107] [2020-08-21 14:56:04,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:04,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:04,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:04,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:04,190 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 14:56:04,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152222107] [2020-08-21 14:56:04,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:04,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:56:04,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635513301] [2020-08-21 14:56:04,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:56:04,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:04,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:56:04,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:04,193 INFO L87 Difference]: Start difference. First operand 61 states and 103 transitions. Second operand 3 states. [2020-08-21 14:56:04,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:04,216 INFO L93 Difference]: Finished difference Result 112 states and 192 transitions. [2020-08-21 14:56:04,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:56:04,216 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 14:56:04,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:04,218 INFO L225 Difference]: With dead ends: 112 [2020-08-21 14:56:04,218 INFO L226 Difference]: Without dead ends: 110 [2020-08-21 14:56:04,219 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 14:56:04,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-21 14:56:04,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 80. [2020-08-21 14:56:04,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-08-21 14:56:04,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 136 transitions. [2020-08-21 14:56:04,231 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 136 transitions. Word has length 19 [2020-08-21 14:56:04,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:04,231 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 136 transitions. [2020-08-21 14:56:04,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:04,231 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 136 transitions. [2020-08-21 14:56:04,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 14:56:04,232 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:04,233 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 14:56:04,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 14:56:04,233 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:04,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:04,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1680264243, now seen corresponding path program 1 times [2020-08-21 14:56:04,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:04,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630751703] [2020-08-21 14:56:04,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:04,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:04,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:04,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:04,272 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 14:56:04,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630751703] [2020-08-21 14:56:04,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:04,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:56:04,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419393103] [2020-08-21 14:56:04,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:56:04,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:04,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:56:04,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:04,275 INFO L87 Difference]: Start difference. First operand 80 states and 136 transitions. Second operand 3 states. [2020-08-21 14:56:04,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:04,299 INFO L93 Difference]: Finished difference Result 184 states and 318 transitions. [2020-08-21 14:56:04,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:56:04,300 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 14:56:04,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:04,302 INFO L225 Difference]: With dead ends: 184 [2020-08-21 14:56:04,302 INFO L226 Difference]: Without dead ends: 112 [2020-08-21 14:56:04,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:04,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-08-21 14:56:04,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2020-08-21 14:56:04,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-08-21 14:56:04,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 186 transitions. [2020-08-21 14:56:04,316 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 186 transitions. Word has length 19 [2020-08-21 14:56:04,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:04,316 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 186 transitions. [2020-08-21 14:56:04,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:04,316 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 186 transitions. [2020-08-21 14:56:04,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 14:56:04,318 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:04,318 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:04,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 14:56:04,319 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:04,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:04,319 INFO L82 PathProgramCache]: Analyzing trace with hash 290632912, now seen corresponding path program 1 times [2020-08-21 14:56:04,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:04,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086169132] [2020-08-21 14:56:04,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:04,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:04,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:04,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:04,360 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 14:56:04,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086169132] [2020-08-21 14:56:04,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:04,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:56:04,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457535283] [2020-08-21 14:56:04,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:56:04,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:04,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:56:04,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:04,364 INFO L87 Difference]: Start difference. First operand 110 states and 186 transitions. Second operand 3 states. [2020-08-21 14:56:04,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:04,390 INFO L93 Difference]: Finished difference Result 165 states and 277 transitions. [2020-08-21 14:56:04,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:56:04,391 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 14:56:04,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:04,392 INFO L225 Difference]: With dead ends: 165 [2020-08-21 14:56:04,392 INFO L226 Difference]: Without dead ends: 114 [2020-08-21 14:56:04,393 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 14:56:04,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-08-21 14:56:04,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-08-21 14:56:04,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-08-21 14:56:04,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 186 transitions. [2020-08-21 14:56:04,405 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 186 transitions. Word has length 20 [2020-08-21 14:56:04,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:04,405 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 186 transitions. [2020-08-21 14:56:04,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:04,406 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 186 transitions. [2020-08-21 14:56:04,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 14:56:04,407 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:04,407 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:04,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 14:56:04,408 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:04,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:04,408 INFO L82 PathProgramCache]: Analyzing trace with hash 548798350, now seen corresponding path program 1 times [2020-08-21 14:56:04,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:04,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086647625] [2020-08-21 14:56:04,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:04,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:04,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:04,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:04,458 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 14:56:04,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086647625] [2020-08-21 14:56:04,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:04,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:56:04,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360829506] [2020-08-21 14:56:04,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:56:04,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:04,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:56:04,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:04,460 INFO L87 Difference]: Start difference. First operand 112 states and 186 transitions. Second operand 3 states. [2020-08-21 14:56:04,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:04,482 INFO L93 Difference]: Finished difference Result 204 states and 344 transitions. [2020-08-21 14:56:04,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:56:04,483 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 14:56:04,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:04,485 INFO L225 Difference]: With dead ends: 204 [2020-08-21 14:56:04,485 INFO L226 Difference]: Without dead ends: 202 [2020-08-21 14:56:04,486 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 14:56:04,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-08-21 14:56:04,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 152. [2020-08-21 14:56:04,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-08-21 14:56:04,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 250 transitions. [2020-08-21 14:56:04,501 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 250 transitions. Word has length 20 [2020-08-21 14:56:04,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:04,502 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 250 transitions. [2020-08-21 14:56:04,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:04,502 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 250 transitions. [2020-08-21 14:56:04,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 14:56:04,503 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:04,504 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:04,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 14:56:04,504 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:04,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:04,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1249862928, now seen corresponding path program 1 times [2020-08-21 14:56:04,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:04,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331360937] [2020-08-21 14:56:04,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:04,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:04,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:04,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:04,549 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 14:56:04,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331360937] [2020-08-21 14:56:04,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:04,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:56:04,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43432120] [2020-08-21 14:56:04,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:56:04,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:04,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:56:04,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:04,554 INFO L87 Difference]: Start difference. First operand 152 states and 250 transitions. Second operand 3 states. [2020-08-21 14:56:04,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:04,580 INFO L93 Difference]: Finished difference Result 352 states and 584 transitions. [2020-08-21 14:56:04,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:56:04,581 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 14:56:04,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:04,582 INFO L225 Difference]: With dead ends: 352 [2020-08-21 14:56:04,583 INFO L226 Difference]: Without dead ends: 210 [2020-08-21 14:56:04,584 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 14:56:04,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-08-21 14:56:04,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2020-08-21 14:56:04,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-08-21 14:56:04,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 338 transitions. [2020-08-21 14:56:04,599 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 338 transitions. Word has length 20 [2020-08-21 14:56:04,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:04,599 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 338 transitions. [2020-08-21 14:56:04,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:04,599 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 338 transitions. [2020-08-21 14:56:04,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 14:56:04,601 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:04,601 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:04,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 14:56:04,602 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:04,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:04,602 INFO L82 PathProgramCache]: Analyzing trace with hash -166905624, now seen corresponding path program 1 times [2020-08-21 14:56:04,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:04,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743551697] [2020-08-21 14:56:04,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:04,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:04,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:04,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:04,630 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 14:56:04,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743551697] [2020-08-21 14:56:04,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:04,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:56:04,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071247875] [2020-08-21 14:56:04,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:56:04,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:04,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:56:04,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:04,632 INFO L87 Difference]: Start difference. First operand 208 states and 338 transitions. Second operand 3 states. [2020-08-21 14:56:04,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:04,650 INFO L93 Difference]: Finished difference Result 312 states and 504 transitions. [2020-08-21 14:56:04,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:56:04,651 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 14:56:04,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:04,653 INFO L225 Difference]: With dead ends: 312 [2020-08-21 14:56:04,653 INFO L226 Difference]: Without dead ends: 214 [2020-08-21 14:56:04,654 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 14:56:04,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-21 14:56:04,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2020-08-21 14:56:04,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-08-21 14:56:04,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 338 transitions. [2020-08-21 14:56:04,667 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 338 transitions. Word has length 21 [2020-08-21 14:56:04,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:04,667 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 338 transitions. [2020-08-21 14:56:04,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:04,667 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 338 transitions. [2020-08-21 14:56:04,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 14:56:04,669 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:04,669 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:04,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 14:56:04,670 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:04,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:04,670 INFO L82 PathProgramCache]: Analyzing trace with hash 91259814, now seen corresponding path program 1 times [2020-08-21 14:56:04,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:04,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003917459] [2020-08-21 14:56:04,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:04,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:04,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:04,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:04,696 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 14:56:04,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003917459] [2020-08-21 14:56:04,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:04,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:56:04,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333467830] [2020-08-21 14:56:04,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:56:04,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:04,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:56:04,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:04,699 INFO L87 Difference]: Start difference. First operand 212 states and 338 transitions. Second operand 3 states. [2020-08-21 14:56:04,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:04,721 INFO L93 Difference]: Finished difference Result 380 states and 616 transitions. [2020-08-21 14:56:04,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:56:04,722 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 14:56:04,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:04,724 INFO L225 Difference]: With dead ends: 380 [2020-08-21 14:56:04,725 INFO L226 Difference]: Without dead ends: 378 [2020-08-21 14:56:04,726 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 14:56:04,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-08-21 14:56:04,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 296. [2020-08-21 14:56:04,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-08-21 14:56:04,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 462 transitions. [2020-08-21 14:56:04,739 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 462 transitions. Word has length 21 [2020-08-21 14:56:04,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:04,739 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 462 transitions. [2020-08-21 14:56:04,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:04,740 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 462 transitions. [2020-08-21 14:56:04,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 14:56:04,741 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:04,742 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:04,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 14:56:04,742 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:04,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:04,742 INFO L82 PathProgramCache]: Analyzing trace with hash 792324392, now seen corresponding path program 1 times [2020-08-21 14:56:04,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:04,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015493381] [2020-08-21 14:56:04,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:04,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:04,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:04,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:04,773 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 14:56:04,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015493381] [2020-08-21 14:56:04,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:04,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:56:04,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348522489] [2020-08-21 14:56:04,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:56:04,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:04,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:56:04,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:04,775 INFO L87 Difference]: Start difference. First operand 296 states and 462 transitions. Second operand 3 states. [2020-08-21 14:56:04,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:04,799 INFO L93 Difference]: Finished difference Result 684 states and 1072 transitions. [2020-08-21 14:56:04,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:56:04,800 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 14:56:04,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:04,803 INFO L225 Difference]: With dead ends: 684 [2020-08-21 14:56:04,803 INFO L226 Difference]: Without dead ends: 402 [2020-08-21 14:56:04,804 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 14:56:04,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-08-21 14:56:04,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 400. [2020-08-21 14:56:04,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-08-21 14:56:04,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 614 transitions. [2020-08-21 14:56:04,830 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 614 transitions. Word has length 21 [2020-08-21 14:56:04,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:04,831 INFO L479 AbstractCegarLoop]: Abstraction has 400 states and 614 transitions. [2020-08-21 14:56:04,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:04,831 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 614 transitions. [2020-08-21 14:56:04,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 14:56:04,833 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:04,833 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:04,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 14:56:04,834 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:04,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:04,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1465698011, now seen corresponding path program 1 times [2020-08-21 14:56:04,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:04,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279358705] [2020-08-21 14:56:04,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:04,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:04,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:04,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:04,901 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 14:56:04,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279358705] [2020-08-21 14:56:04,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:04,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:56:04,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264838785] [2020-08-21 14:56:04,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:56:04,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:04,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:56:04,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:04,904 INFO L87 Difference]: Start difference. First operand 400 states and 614 transitions. Second operand 3 states. [2020-08-21 14:56:04,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:04,933 INFO L93 Difference]: Finished difference Result 600 states and 916 transitions. [2020-08-21 14:56:04,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:56:04,934 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 14:56:04,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:04,937 INFO L225 Difference]: With dead ends: 600 [2020-08-21 14:56:04,937 INFO L226 Difference]: Without dead ends: 410 [2020-08-21 14:56:04,938 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 14:56:04,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-08-21 14:56:04,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 408. [2020-08-21 14:56:04,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-08-21 14:56:04,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 614 transitions. [2020-08-21 14:56:04,955 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 614 transitions. Word has length 22 [2020-08-21 14:56:04,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:04,957 INFO L479 AbstractCegarLoop]: Abstraction has 408 states and 614 transitions. [2020-08-21 14:56:04,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:04,957 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 614 transitions. [2020-08-21 14:56:04,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 14:56:04,960 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:04,961 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:04,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 14:56:04,963 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:04,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:04,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1207532573, now seen corresponding path program 1 times [2020-08-21 14:56:04,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:04,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480652415] [2020-08-21 14:56:04,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:04,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:04,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:04,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:04,988 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 14:56:04,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480652415] [2020-08-21 14:56:04,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:04,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:56:04,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574134656] [2020-08-21 14:56:04,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:56:04,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:04,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:56:04,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:04,991 INFO L87 Difference]: Start difference. First operand 408 states and 614 transitions. Second operand 3 states. [2020-08-21 14:56:05,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:05,013 INFO L93 Difference]: Finished difference Result 716 states and 1096 transitions. [2020-08-21 14:56:05,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:56:05,014 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 14:56:05,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:05,018 INFO L225 Difference]: With dead ends: 716 [2020-08-21 14:56:05,018 INFO L226 Difference]: Without dead ends: 714 [2020-08-21 14:56:05,019 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 14:56:05,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2020-08-21 14:56:05,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 584. [2020-08-21 14:56:05,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-08-21 14:56:05,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 854 transitions. [2020-08-21 14:56:05,039 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 854 transitions. Word has length 22 [2020-08-21 14:56:05,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:05,039 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 854 transitions. [2020-08-21 14:56:05,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:05,039 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 854 transitions. [2020-08-21 14:56:05,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 14:56:05,041 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:05,041 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:05,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 14:56:05,041 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:05,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:05,042 INFO L82 PathProgramCache]: Analyzing trace with hash -506467995, now seen corresponding path program 1 times [2020-08-21 14:56:05,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:05,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208363089] [2020-08-21 14:56:05,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:05,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:05,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:05,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:05,065 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 14:56:05,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208363089] [2020-08-21 14:56:05,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:05,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:56:05,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481554731] [2020-08-21 14:56:05,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:56:05,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:05,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:56:05,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:05,067 INFO L87 Difference]: Start difference. First operand 584 states and 854 transitions. Second operand 3 states. [2020-08-21 14:56:05,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:05,095 INFO L93 Difference]: Finished difference Result 1340 states and 1960 transitions. [2020-08-21 14:56:05,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:56:05,096 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 14:56:05,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:05,101 INFO L225 Difference]: With dead ends: 1340 [2020-08-21 14:56:05,101 INFO L226 Difference]: Without dead ends: 778 [2020-08-21 14:56:05,102 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 14:56:05,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2020-08-21 14:56:05,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 776. [2020-08-21 14:56:05,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-08-21 14:56:05,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1110 transitions. [2020-08-21 14:56:05,129 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1110 transitions. Word has length 22 [2020-08-21 14:56:05,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:05,130 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1110 transitions. [2020-08-21 14:56:05,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:05,130 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1110 transitions. [2020-08-21 14:56:05,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 14:56:05,131 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:05,132 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:05,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 14:56:05,132 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:05,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:05,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1221411293, now seen corresponding path program 1 times [2020-08-21 14:56:05,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:05,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783291414] [2020-08-21 14:56:05,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:05,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:05,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:05,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:05,154 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 14:56:05,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783291414] [2020-08-21 14:56:05,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:05,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:56:05,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111025608] [2020-08-21 14:56:05,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:56:05,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:05,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:56:05,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:05,156 INFO L87 Difference]: Start difference. First operand 776 states and 1110 transitions. Second operand 3 states. [2020-08-21 14:56:05,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:05,184 INFO L93 Difference]: Finished difference Result 1164 states and 1656 transitions. [2020-08-21 14:56:05,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:56:05,185 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 14:56:05,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:05,190 INFO L225 Difference]: With dead ends: 1164 [2020-08-21 14:56:05,190 INFO L226 Difference]: Without dead ends: 794 [2020-08-21 14:56:05,191 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 14:56:05,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2020-08-21 14:56:05,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 792. [2020-08-21 14:56:05,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 792 states. [2020-08-21 14:56:05,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1110 transitions. [2020-08-21 14:56:05,220 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1110 transitions. Word has length 23 [2020-08-21 14:56:05,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:05,220 INFO L479 AbstractCegarLoop]: Abstraction has 792 states and 1110 transitions. [2020-08-21 14:56:05,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:05,221 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1110 transitions. [2020-08-21 14:56:05,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 14:56:05,222 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:05,223 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:05,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 14:56:05,223 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:05,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:05,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1479576731, now seen corresponding path program 1 times [2020-08-21 14:56:05,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:05,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188431477] [2020-08-21 14:56:05,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:05,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:05,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:05,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:05,253 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 14:56:05,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188431477] [2020-08-21 14:56:05,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:05,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:56:05,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531562152] [2020-08-21 14:56:05,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:56:05,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:05,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:56:05,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:05,259 INFO L87 Difference]: Start difference. First operand 792 states and 1110 transitions. Second operand 3 states. [2020-08-21 14:56:05,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:05,306 INFO L93 Difference]: Finished difference Result 1356 states and 1928 transitions. [2020-08-21 14:56:05,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:56:05,307 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 14:56:05,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:05,314 INFO L225 Difference]: With dead ends: 1356 [2020-08-21 14:56:05,314 INFO L226 Difference]: Without dead ends: 1354 [2020-08-21 14:56:05,315 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 14:56:05,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-08-21 14:56:05,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1160. [2020-08-21 14:56:05,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1160 states. [2020-08-21 14:56:05,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1574 transitions. [2020-08-21 14:56:05,374 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1574 transitions. Word has length 23 [2020-08-21 14:56:05,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:05,374 INFO L479 AbstractCegarLoop]: Abstraction has 1160 states and 1574 transitions. [2020-08-21 14:56:05,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:05,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1574 transitions. [2020-08-21 14:56:05,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 14:56:05,378 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:05,378 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:05,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 14:56:05,378 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:05,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:05,379 INFO L82 PathProgramCache]: Analyzing trace with hash -2114325987, now seen corresponding path program 1 times [2020-08-21 14:56:05,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:05,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80155844] [2020-08-21 14:56:05,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:05,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:05,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:05,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:05,403 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 14:56:05,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80155844] [2020-08-21 14:56:05,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:05,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:56:05,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287736008] [2020-08-21 14:56:05,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:56:05,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:05,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:56:05,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:05,409 INFO L87 Difference]: Start difference. First operand 1160 states and 1574 transitions. Second operand 3 states. [2020-08-21 14:56:05,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:05,451 INFO L93 Difference]: Finished difference Result 2636 states and 3560 transitions. [2020-08-21 14:56:05,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:56:05,452 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 14:56:05,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:05,459 INFO L225 Difference]: With dead ends: 2636 [2020-08-21 14:56:05,459 INFO L226 Difference]: Without dead ends: 1514 [2020-08-21 14:56:05,463 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 14:56:05,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2020-08-21 14:56:05,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1512. [2020-08-21 14:56:05,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1512 states. [2020-08-21 14:56:05,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 1990 transitions. [2020-08-21 14:56:05,511 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 1990 transitions. Word has length 23 [2020-08-21 14:56:05,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:05,512 INFO L479 AbstractCegarLoop]: Abstraction has 1512 states and 1990 transitions. [2020-08-21 14:56:05,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:05,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 1990 transitions. [2020-08-21 14:56:05,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 14:56:05,515 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:05,515 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:05,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 14:56:05,516 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:05,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:05,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1377545862, now seen corresponding path program 1 times [2020-08-21 14:56:05,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:05,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451393477] [2020-08-21 14:56:05,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:05,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:05,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:05,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:05,543 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 14:56:05,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451393477] [2020-08-21 14:56:05,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:05,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:56:05,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745192820] [2020-08-21 14:56:05,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:56:05,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:05,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:56:05,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:05,549 INFO L87 Difference]: Start difference. First operand 1512 states and 1990 transitions. Second operand 3 states. [2020-08-21 14:56:05,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:05,587 INFO L93 Difference]: Finished difference Result 2268 states and 2968 transitions. [2020-08-21 14:56:05,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:56:05,588 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 14:56:05,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:05,595 INFO L225 Difference]: With dead ends: 2268 [2020-08-21 14:56:05,595 INFO L226 Difference]: Without dead ends: 1546 [2020-08-21 14:56:05,597 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 14:56:05,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-08-21 14:56:05,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1544. [2020-08-21 14:56:05,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-08-21 14:56:05,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 1990 transitions. [2020-08-21 14:56:05,649 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 1990 transitions. Word has length 24 [2020-08-21 14:56:05,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:05,649 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 1990 transitions. [2020-08-21 14:56:05,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:05,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 1990 transitions. [2020-08-21 14:56:05,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 14:56:05,653 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:05,653 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:05,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 14:56:05,653 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:05,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:05,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1119380424, now seen corresponding path program 1 times [2020-08-21 14:56:05,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:05,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036519808] [2020-08-21 14:56:05,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:05,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:05,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:05,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:05,685 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 14:56:05,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036519808] [2020-08-21 14:56:05,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:05,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:56:05,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978878179] [2020-08-21 14:56:05,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:56:05,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:05,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:56:05,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:05,688 INFO L87 Difference]: Start difference. First operand 1544 states and 1990 transitions. Second operand 3 states. [2020-08-21 14:56:05,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:05,750 INFO L93 Difference]: Finished difference Result 2572 states and 3336 transitions. [2020-08-21 14:56:05,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:56:05,751 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 14:56:05,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:05,763 INFO L225 Difference]: With dead ends: 2572 [2020-08-21 14:56:05,763 INFO L226 Difference]: Without dead ends: 2570 [2020-08-21 14:56:05,765 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 14:56:05,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2020-08-21 14:56:05,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 2312. [2020-08-21 14:56:05,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2312 states. [2020-08-21 14:56:05,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 2886 transitions. [2020-08-21 14:56:05,835 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 2886 transitions. Word has length 24 [2020-08-21 14:56:05,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:05,835 INFO L479 AbstractCegarLoop]: Abstraction has 2312 states and 2886 transitions. [2020-08-21 14:56:05,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:05,835 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 2886 transitions. [2020-08-21 14:56:05,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 14:56:05,840 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:05,840 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:05,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 14:56:05,840 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:05,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:05,841 INFO L82 PathProgramCache]: Analyzing trace with hash -418315846, now seen corresponding path program 1 times [2020-08-21 14:56:05,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:05,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216790204] [2020-08-21 14:56:05,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:05,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:05,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:05,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:05,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:56:05,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216790204] [2020-08-21 14:56:05,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:05,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:56:05,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961514962] [2020-08-21 14:56:05,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:56:05,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:05,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:56:05,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:05,874 INFO L87 Difference]: Start difference. First operand 2312 states and 2886 transitions. Second operand 3 states. [2020-08-21 14:56:05,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:05,986 INFO L93 Difference]: Finished difference Result 5196 states and 6408 transitions. [2020-08-21 14:56:06,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:56:06,006 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 14:56:06,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:06,025 INFO L225 Difference]: With dead ends: 5196 [2020-08-21 14:56:06,025 INFO L226 Difference]: Without dead ends: 2954 [2020-08-21 14:56:06,029 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 14:56:06,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-08-21 14:56:06,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2952. [2020-08-21 14:56:06,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2952 states. [2020-08-21 14:56:06,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 3526 transitions. [2020-08-21 14:56:06,142 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 3526 transitions. Word has length 24 [2020-08-21 14:56:06,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:06,142 INFO L479 AbstractCegarLoop]: Abstraction has 2952 states and 3526 transitions. [2020-08-21 14:56:06,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:06,143 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 3526 transitions. [2020-08-21 14:56:06,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 14:56:06,147 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:06,147 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:06,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 14:56:06,147 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:06,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:06,148 INFO L82 PathProgramCache]: Analyzing trace with hash -340838702, now seen corresponding path program 1 times [2020-08-21 14:56:06,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:06,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134108244] [2020-08-21 14:56:06,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:06,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:06,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:06,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:06,174 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 14:56:06,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134108244] [2020-08-21 14:56:06,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:06,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:56:06,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181368606] [2020-08-21 14:56:06,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:56:06,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:06,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:56:06,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:06,176 INFO L87 Difference]: Start difference. First operand 2952 states and 3526 transitions. Second operand 3 states. [2020-08-21 14:56:06,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:06,240 INFO L93 Difference]: Finished difference Result 4428 states and 5256 transitions. [2020-08-21 14:56:06,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:56:06,241 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 14:56:06,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:06,254 INFO L225 Difference]: With dead ends: 4428 [2020-08-21 14:56:06,254 INFO L226 Difference]: Without dead ends: 3018 [2020-08-21 14:56:06,258 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 14:56:06,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2020-08-21 14:56:06,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 3016. [2020-08-21 14:56:06,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-08-21 14:56:06,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3526 transitions. [2020-08-21 14:56:06,342 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3526 transitions. Word has length 25 [2020-08-21 14:56:06,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:06,342 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3526 transitions. [2020-08-21 14:56:06,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:06,342 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3526 transitions. [2020-08-21 14:56:06,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 14:56:06,347 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:06,347 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:06,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 14:56:06,347 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:06,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:06,348 INFO L82 PathProgramCache]: Analyzing trace with hash -82673264, now seen corresponding path program 1 times [2020-08-21 14:56:06,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:06,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517045152] [2020-08-21 14:56:06,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:06,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:06,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:06,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:06,370 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 14:56:06,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517045152] [2020-08-21 14:56:06,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:06,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:56:06,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797974968] [2020-08-21 14:56:06,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:56:06,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:06,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:56:06,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:06,372 INFO L87 Difference]: Start difference. First operand 3016 states and 3526 transitions. Second operand 3 states. [2020-08-21 14:56:06,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:06,480 INFO L93 Difference]: Finished difference Result 8650 states and 9799 transitions. [2020-08-21 14:56:06,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:56:06,481 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 14:56:06,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:06,495 INFO L225 Difference]: With dead ends: 8650 [2020-08-21 14:56:06,495 INFO L226 Difference]: Without dead ends: 3016 [2020-08-21 14:56:06,505 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 14:56:06,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3016 states. [2020-08-21 14:56:06,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3016 to 3016. [2020-08-21 14:56:06,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-08-21 14:56:06,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3270 transitions. [2020-08-21 14:56:06,631 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3270 transitions. Word has length 25 [2020-08-21 14:56:06,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:06,631 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3270 transitions. [2020-08-21 14:56:06,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:06,631 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3270 transitions. [2020-08-21 14:56:06,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 14:56:06,636 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:56:06,636 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:56:06,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 14:56:06,638 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:56:06,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:56:06,639 INFO L82 PathProgramCache]: Analyzing trace with hash -783737842, now seen corresponding path program 1 times [2020-08-21 14:56:06,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:56:06,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [849155333] [2020-08-21 14:56:06,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:56:06,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:06,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:56:06,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:56:06,661 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 14:56:06,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [849155333] [2020-08-21 14:56:06,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:56:06,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:56:06,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011200353] [2020-08-21 14:56:06,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:56:06,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:56:06,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:56:06,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:56:06,663 INFO L87 Difference]: Start difference. First operand 3016 states and 3270 transitions. Second operand 3 states. [2020-08-21 14:56:06,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:56:06,707 INFO L93 Difference]: Finished difference Result 3016 states and 3270 transitions. [2020-08-21 14:56:06,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:56:06,707 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 14:56:06,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:56:06,708 INFO L225 Difference]: With dead ends: 3016 [2020-08-21 14:56:06,708 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 14:56:06,713 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 14:56:06,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 14:56:06,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 14:56:06,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 14:56:06,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 14:56:06,714 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-08-21 14:56:06,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:56:06,714 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 14:56:06,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:56:06,714 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 14:56:06,714 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 14:56:06,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 14:56:06,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 14:56:06,739 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 14:56:06,739 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 14:56:06,739 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 14:56:06,739 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 14:56:06,739 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 14:56:06,739 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 14:56:06,740 INFO L268 CegarLoopResult]: For program point L126(line 126) no Hoare annotation was computed. [2020-08-21 14:56:06,740 INFO L264 CegarLoopResult]: At program point L126-1(lines 5 135) the Hoare annotation is: false [2020-08-21 14:56:06,740 INFO L268 CegarLoopResult]: For program point L60-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 14:56:06,740 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 135) no Hoare annotation was computed. [2020-08-21 14:56:06,740 INFO L268 CegarLoopResult]: For program point L110-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 14:56:06,740 INFO L268 CegarLoopResult]: For program point L111(line 111) no Hoare annotation was computed. [2020-08-21 14:56:06,740 INFO L268 CegarLoopResult]: For program point L95-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 14:56:06,740 INFO L268 CegarLoopResult]: For program point L120-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 14:56:06,741 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 135) no Hoare annotation was computed. [2020-08-21 14:56:06,741 INFO L268 CegarLoopResult]: For program point L96(line 96) no Hoare annotation was computed. [2020-08-21 14:56:06,741 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 133) no Hoare annotation was computed. [2020-08-21 14:56:06,741 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 135) the Hoare annotation is: true [2020-08-21 14:56:06,741 INFO L268 CegarLoopResult]: For program point L121(line 121) no Hoare annotation was computed. [2020-08-21 14:56:06,741 INFO L268 CegarLoopResult]: For program point L80-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 14:56:06,741 INFO L268 CegarLoopResult]: For program point L105-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 14:56:06,742 INFO L268 CegarLoopResult]: For program point L72-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 14:56:06,742 INFO L268 CegarLoopResult]: For program point L64-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 14:56:06,742 INFO L268 CegarLoopResult]: For program point L56(lines 56 58) no Hoare annotation was computed. [2020-08-21 14:56:06,742 INFO L268 CegarLoopResult]: For program point L56-2(lines 33 130) no Hoare annotation was computed. [2020-08-21 14:56:06,742 INFO L268 CegarLoopResult]: For program point L106(line 106) no Hoare annotation was computed. [2020-08-21 14:56:06,742 INFO L271 CegarLoopResult]: At program point L131(lines 5 135) the Hoare annotation is: true [2020-08-21 14:56:06,742 INFO L268 CegarLoopResult]: For program point L90-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 14:56:06,742 INFO L268 CegarLoopResult]: For program point L115-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 14:56:06,743 INFO L268 CegarLoopResult]: For program point L91(line 91) no Hoare annotation was computed. [2020-08-21 14:56:06,743 INFO L268 CegarLoopResult]: For program point L116(line 116) no Hoare annotation was computed. [2020-08-21 14:56:06,743 INFO L268 CegarLoopResult]: For program point L100-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 14:56:06,743 INFO L271 CegarLoopResult]: At program point L125-1(lines 33 130) the Hoare annotation is: true [2020-08-21 14:56:06,743 INFO L268 CegarLoopResult]: For program point L84-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 14:56:06,743 INFO L268 CegarLoopResult]: For program point L76-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 14:56:06,743 INFO L268 CegarLoopResult]: For program point L101(line 101) no Hoare annotation was computed. [2020-08-21 14:56:06,743 INFO L268 CegarLoopResult]: For program point L35(lines 35 37) no Hoare annotation was computed. [2020-08-21 14:56:06,743 INFO L268 CegarLoopResult]: For program point L68-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 14:56:06,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 02:56:06 BoogieIcfgContainer [2020-08-21 14:56:06,755 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 14:56:06,758 INFO L168 Benchmark]: Toolchain (without parser) took 4271.31 ms. Allocated memory was 137.4 MB in the beginning and 302.0 MB in the end (delta: 164.6 MB). Free memory was 100.5 MB in the beginning and 211.6 MB in the end (delta: -111.1 MB). Peak memory consumption was 53.5 MB. Max. memory is 7.1 GB. [2020-08-21 14:56:06,759 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 137.4 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 14:56:06,759 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.47 ms. Allocated memory is still 137.4 MB. Free memory was 100.3 MB in the beginning and 89.9 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-08-21 14:56:06,760 INFO L168 Benchmark]: Boogie Preprocessor took 135.02 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 89.9 MB in the beginning and 178.6 MB in the end (delta: -88.7 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-21 14:56:06,760 INFO L168 Benchmark]: RCFGBuilder took 367.45 ms. Allocated memory is still 200.8 MB. Free memory was 178.6 MB in the beginning and 160.5 MB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 7.1 GB. [2020-08-21 14:56:06,761 INFO L168 Benchmark]: TraceAbstraction took 3495.69 ms. Allocated memory was 200.8 MB in the beginning and 302.0 MB in the end (delta: 101.2 MB). Free memory was 159.8 MB in the beginning and 211.6 MB in the end (delta: -51.8 MB). Peak memory consumption was 49.4 MB. Max. memory is 7.1 GB. [2020-08-21 14:56:06,763 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 137.4 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 268.47 ms. Allocated memory is still 137.4 MB. Free memory was 100.3 MB in the beginning and 89.9 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 135.02 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 89.9 MB in the beginning and 178.6 MB in the end (delta: -88.7 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 367.45 ms. Allocated memory is still 200.8 MB. Free memory was 178.6 MB in the beginning and 160.5 MB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3495.69 ms. Allocated memory was 200.8 MB in the beginning and 302.0 MB in the end (delta: 101.2 MB). Free memory was 159.8 MB in the beginning and 211.6 MB in the end (delta: -51.8 MB). Peak memory consumption was 49.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 133]: 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: 33]: 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, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.3s, OverallIterations: 23, TraceHistogramMax: 1, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1573 SDtfs, 755 SDslu, 1056 SDs, 0 SdLazy, 121 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3016occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 23 MinimizatonAttempts, 790 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 266 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 498 NumberOfCodeBlocks, 498 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 475 ConstructedInterpolants, 0 QuantifiedInterpolants, 19027 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 23 InterpolantComputations, 23 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...