/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 23:32:10,180 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-18 23:32:10,227 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 23:32:10,228 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 23:32:10,229 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 23:32:10,231 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 23:32:10,233 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 23:32:10,234 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 23:32:10,235 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 23:32:10,236 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 23:32:10,236 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 23:32:10,237 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 23:32:10,238 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 23:32:10,239 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 23:32:10,240 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 23:32:10,241 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 23:32:10,243 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 23:32:10,245 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 23:32:10,247 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 23:32:10,248 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 23:32:10,249 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 23:32:10,250 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 23:32:10,254 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 23:32:10,262 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 23:32:10,263 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 23:32:10,264 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 23:32:10,265 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 23:32:10,288 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 23:32:10,289 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 23:32:10,290 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 23:32:10,290 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 23:32:10,290 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 23:32:10,291 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 23:32:10,291 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 23:32:10,291 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 23:32:10,291 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 23:32:10,292 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 23:32:10,292 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 23:32:10,292 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 23:32:10,292 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 23:32:10,292 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 23:32:10,292 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 23:32:10,293 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 23:32:10,293 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 23:32:10,293 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 23:32:10,293 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 23:32:10,294 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 23:32:10,294 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 23:32:10,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 23:32:10,294 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 23:32:10,294 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 23:32:10,295 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 23:32:10,295 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 23:32:10,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 23:32:10,295 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 23:32:10,296 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 23:32:10,296 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; [2020-08-18 23:32:10,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 23:32:10,611 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 23:32:10,615 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 23:32:10,617 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 23:32:10,617 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 23:32:10,618 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2020-08-18 23:32:10,683 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b58e29999/72807e281d3546139796d13699c0f59e/FLAG44490ea66 [2020-08-18 23:32:11,161 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 23:32:11,162 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_11.c [2020-08-18 23:32:11,175 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b58e29999/72807e281d3546139796d13699c0f59e/FLAG44490ea66 [2020-08-18 23:32:11,496 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b58e29999/72807e281d3546139796d13699c0f59e [2020-08-18 23:32:11,508 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 23:32:11,510 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 23:32:11,511 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 23:32:11,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 23:32:11,515 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 23:32:11,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:32:11" (1/1) ... [2020-08-18 23:32:11,519 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51a556b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:11, skipping insertion in model container [2020-08-18 23:32:11,519 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:32:11" (1/1) ... [2020-08-18 23:32:11,529 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 23:32:11,565 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 23:32:11,834 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 23:32:11,839 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 23:32:11,864 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 23:32:11,878 INFO L208 MainTranslator]: Completed translation [2020-08-18 23:32:11,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:11 WrapperNode [2020-08-18 23:32:11,879 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 23:32:11,880 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 23:32:11,880 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 23:32:11,880 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 23:32:11,970 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:11" (1/1) ... [2020-08-18 23:32:11,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:11" (1/1) ... [2020-08-18 23:32:11,977 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:11" (1/1) ... [2020-08-18 23:32:11,978 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:11" (1/1) ... [2020-08-18 23:32:11,983 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:11" (1/1) ... [2020-08-18 23:32:11,991 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:11" (1/1) ... [2020-08-18 23:32:11,993 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:11" (1/1) ... [2020-08-18 23:32:11,996 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 23:32:11,996 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 23:32:11,996 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 23:32:11,997 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 23:32:11,997 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:11" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 23:32:12,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 23:32:12,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 23:32:12,057 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 23:32:12,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 23:32:12,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 23:32:12,057 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 23:32:12,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 23:32:12,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 23:32:12,371 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 23:32:12,372 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 23:32:12,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:32:12 BoogieIcfgContainer [2020-08-18 23:32:12,376 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 23:32:12,377 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 23:32:12,377 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 23:32:12,380 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 23:32:12,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:32:11" (1/3) ... [2020-08-18 23:32:12,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33ccca2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:32:12, skipping insertion in model container [2020-08-18 23:32:12,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:11" (2/3) ... [2020-08-18 23:32:12,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33ccca2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:32:12, skipping insertion in model container [2020-08-18 23:32:12,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:32:12" (3/3) ... [2020-08-18 23:32:12,384 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-08-18 23:32:12,396 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 23:32:12,405 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 23:32:12,421 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 23:32:12,449 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 23:32:12,449 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 23:32:12,449 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 23:32:12,449 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 23:32:12,450 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 23:32:12,450 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 23:32:12,450 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 23:32:12,450 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 23:32:12,477 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-08-18 23:32:12,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 23:32:12,487 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:12,488 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] [2020-08-18 23:32:12,489 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:12,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:12,495 INFO L82 PathProgramCache]: Analyzing trace with hash -316470182, now seen corresponding path program 1 times [2020-08-18 23:32:12,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:12,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55177509] [2020-08-18 23:32:12,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:12,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:12,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:12,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:12,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:12,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55177509] [2020-08-18 23:32:12,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:12,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:12,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177679250] [2020-08-18 23:32:12,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:12,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:12,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:12,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:12,755 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-08-18 23:32:12,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:12,823 INFO L93 Difference]: Finished difference Result 93 states and 162 transitions. [2020-08-18 23:32:12,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:12,825 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 23:32:12,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:12,839 INFO L225 Difference]: With dead ends: 93 [2020-08-18 23:32:12,839 INFO L226 Difference]: Without dead ends: 78 [2020-08-18 23:32:12,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:12,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-18 23:32:12,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2020-08-18 23:32:12,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-18 23:32:12,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 97 transitions. [2020-08-18 23:32:12,894 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 97 transitions. Word has length 21 [2020-08-18 23:32:12,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:12,895 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 97 transitions. [2020-08-18 23:32:12,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:12,895 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 97 transitions. [2020-08-18 23:32:12,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 23:32:12,897 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:12,897 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] [2020-08-18 23:32:12,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 23:32:12,898 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:12,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:12,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1327587432, now seen corresponding path program 1 times [2020-08-18 23:32:12,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:12,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868079052] [2020-08-18 23:32:12,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:12,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:12,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:12,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:12,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:12,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868079052] [2020-08-18 23:32:12,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:12,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:12,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956345048] [2020-08-18 23:32:12,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:12,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:12,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:12,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:12,994 INFO L87 Difference]: Start difference. First operand 54 states and 97 transitions. Second operand 3 states. [2020-08-18 23:32:13,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:13,033 INFO L93 Difference]: Finished difference Result 127 states and 232 transitions. [2020-08-18 23:32:13,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:13,034 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 23:32:13,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:13,036 INFO L225 Difference]: With dead ends: 127 [2020-08-18 23:32:13,036 INFO L226 Difference]: Without dead ends: 78 [2020-08-18 23:32:13,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:13,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-18 23:32:13,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-08-18 23:32:13,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-18 23:32:13,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 137 transitions. [2020-08-18 23:32:13,050 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 137 transitions. Word has length 21 [2020-08-18 23:32:13,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:13,050 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 137 transitions. [2020-08-18 23:32:13,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:13,050 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 137 transitions. [2020-08-18 23:32:13,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 23:32:13,052 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:13,052 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] [2020-08-18 23:32:13,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 23:32:13,053 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:13,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:13,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1220427994, now seen corresponding path program 1 times [2020-08-18 23:32:13,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:13,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950100307] [2020-08-18 23:32:13,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:13,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:13,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:13,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:13,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:13,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950100307] [2020-08-18 23:32:13,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:13,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:13,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761358184] [2020-08-18 23:32:13,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:13,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:13,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:13,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:13,117 INFO L87 Difference]: Start difference. First operand 76 states and 137 transitions. Second operand 3 states. [2020-08-18 23:32:13,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:13,143 INFO L93 Difference]: Finished difference Result 117 states and 207 transitions. [2020-08-18 23:32:13,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:13,144 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 23:32:13,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:13,145 INFO L225 Difference]: With dead ends: 117 [2020-08-18 23:32:13,146 INFO L226 Difference]: Without dead ends: 81 [2020-08-18 23:32:13,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:13,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-18 23:32:13,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-08-18 23:32:13,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-18 23:32:13,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 139 transitions. [2020-08-18 23:32:13,158 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 139 transitions. Word has length 22 [2020-08-18 23:32:13,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:13,158 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 139 transitions. [2020-08-18 23:32:13,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:13,159 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 139 transitions. [2020-08-18 23:32:13,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 23:32:13,160 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:13,160 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] [2020-08-18 23:32:13,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 23:32:13,160 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:13,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:13,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1794675624, now seen corresponding path program 1 times [2020-08-18 23:32:13,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:13,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [567089316] [2020-08-18 23:32:13,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:13,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:13,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:13,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:13,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:13,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [567089316] [2020-08-18 23:32:13,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:13,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:13,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487334112] [2020-08-18 23:32:13,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:13,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:13,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:13,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:13,272 INFO L87 Difference]: Start difference. First operand 79 states and 139 transitions. Second operand 3 states. [2020-08-18 23:32:13,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:13,294 INFO L93 Difference]: Finished difference Result 148 states and 264 transitions. [2020-08-18 23:32:13,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:13,294 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 23:32:13,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:13,297 INFO L225 Difference]: With dead ends: 148 [2020-08-18 23:32:13,297 INFO L226 Difference]: Without dead ends: 146 [2020-08-18 23:32:13,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:13,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-08-18 23:32:13,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 104. [2020-08-18 23:32:13,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-18 23:32:13,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 184 transitions. [2020-08-18 23:32:13,312 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 184 transitions. Word has length 22 [2020-08-18 23:32:13,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:13,312 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 184 transitions. [2020-08-18 23:32:13,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:13,313 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 184 transitions. [2020-08-18 23:32:13,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 23:32:13,314 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:13,314 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] [2020-08-18 23:32:13,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 23:32:13,315 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:13,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:13,315 INFO L82 PathProgramCache]: Analyzing trace with hash 783558374, now seen corresponding path program 1 times [2020-08-18 23:32:13,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:13,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225051823] [2020-08-18 23:32:13,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:13,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:13,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:13,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:13,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:13,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225051823] [2020-08-18 23:32:13,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:13,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:13,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018484808] [2020-08-18 23:32:13,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:13,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:13,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:13,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:13,360 INFO L87 Difference]: Start difference. First operand 104 states and 184 transitions. Second operand 3 states. [2020-08-18 23:32:13,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:13,385 INFO L93 Difference]: Finished difference Result 244 states and 438 transitions. [2020-08-18 23:32:13,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:13,386 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 23:32:13,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:13,388 INFO L225 Difference]: With dead ends: 244 [2020-08-18 23:32:13,388 INFO L226 Difference]: Without dead ends: 148 [2020-08-18 23:32:13,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:13,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-08-18 23:32:13,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2020-08-18 23:32:13,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-08-18 23:32:13,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 258 transitions. [2020-08-18 23:32:13,405 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 258 transitions. Word has length 22 [2020-08-18 23:32:13,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:13,406 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 258 transitions. [2020-08-18 23:32:13,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:13,406 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 258 transitions. [2020-08-18 23:32:13,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 23:32:13,407 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:13,408 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] [2020-08-18 23:32:13,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 23:32:13,408 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:13,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:13,409 INFO L82 PathProgramCache]: Analyzing trace with hash -199417107, now seen corresponding path program 1 times [2020-08-18 23:32:13,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:13,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388488539] [2020-08-18 23:32:13,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:13,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:13,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:13,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:13,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:13,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388488539] [2020-08-18 23:32:13,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:13,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:13,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107151849] [2020-08-18 23:32:13,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:13,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:13,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:13,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:13,455 INFO L87 Difference]: Start difference. First operand 146 states and 258 transitions. Second operand 3 states. [2020-08-18 23:32:13,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:13,474 INFO L93 Difference]: Finished difference Result 219 states and 385 transitions. [2020-08-18 23:32:13,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:13,475 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 23:32:13,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:13,477 INFO L225 Difference]: With dead ends: 219 [2020-08-18 23:32:13,477 INFO L226 Difference]: Without dead ends: 150 [2020-08-18 23:32:13,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:13,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-18 23:32:13,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2020-08-18 23:32:13,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-08-18 23:32:13,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 258 transitions. [2020-08-18 23:32:13,511 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 258 transitions. Word has length 23 [2020-08-18 23:32:13,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:13,511 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 258 transitions. [2020-08-18 23:32:13,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:13,512 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 258 transitions. [2020-08-18 23:32:13,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 23:32:13,516 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:13,516 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] [2020-08-18 23:32:13,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 23:32:13,519 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:13,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:13,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1479280785, now seen corresponding path program 1 times [2020-08-18 23:32:13,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:13,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877153292] [2020-08-18 23:32:13,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:13,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:13,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:13,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:13,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:13,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877153292] [2020-08-18 23:32:13,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:13,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:13,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079105332] [2020-08-18 23:32:13,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:13,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:13,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:13,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:13,593 INFO L87 Difference]: Start difference. First operand 148 states and 258 transitions. Second operand 3 states. [2020-08-18 23:32:13,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:13,613 INFO L93 Difference]: Finished difference Result 276 states and 488 transitions. [2020-08-18 23:32:13,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:13,614 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 23:32:13,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:13,616 INFO L225 Difference]: With dead ends: 276 [2020-08-18 23:32:13,616 INFO L226 Difference]: Without dead ends: 274 [2020-08-18 23:32:13,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:13,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-18 23:32:13,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 200. [2020-08-18 23:32:13,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-18 23:32:13,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 346 transitions. [2020-08-18 23:32:13,634 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 346 transitions. Word has length 23 [2020-08-18 23:32:13,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:13,634 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 346 transitions. [2020-08-18 23:32:13,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:13,635 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 346 transitions. [2020-08-18 23:32:13,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 23:32:13,636 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:13,636 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] [2020-08-18 23:32:13,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 23:32:13,637 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:13,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:13,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1804569261, now seen corresponding path program 1 times [2020-08-18 23:32:13,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:13,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724187574] [2020-08-18 23:32:13,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:13,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:13,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:13,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:13,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:13,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724187574] [2020-08-18 23:32:13,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:13,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:13,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995382750] [2020-08-18 23:32:13,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:13,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:13,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:13,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:13,672 INFO L87 Difference]: Start difference. First operand 200 states and 346 transitions. Second operand 3 states. [2020-08-18 23:32:13,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:13,695 INFO L93 Difference]: Finished difference Result 472 states and 824 transitions. [2020-08-18 23:32:13,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:13,695 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 23:32:13,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:13,697 INFO L225 Difference]: With dead ends: 472 [2020-08-18 23:32:13,698 INFO L226 Difference]: Without dead ends: 282 [2020-08-18 23:32:13,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:13,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-08-18 23:32:13,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2020-08-18 23:32:13,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-08-18 23:32:13,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 482 transitions. [2020-08-18 23:32:13,723 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 482 transitions. Word has length 23 [2020-08-18 23:32:13,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:13,724 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 482 transitions. [2020-08-18 23:32:13,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:13,724 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 482 transitions. [2020-08-18 23:32:13,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 23:32:13,729 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:13,729 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] [2020-08-18 23:32:13,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 23:32:13,729 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:13,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:13,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1387149659, now seen corresponding path program 1 times [2020-08-18 23:32:13,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:13,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022017140] [2020-08-18 23:32:13,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:13,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:13,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:13,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:13,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:13,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022017140] [2020-08-18 23:32:13,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:13,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:13,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549771947] [2020-08-18 23:32:13,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:13,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:13,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:13,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:13,788 INFO L87 Difference]: Start difference. First operand 280 states and 482 transitions. Second operand 3 states. [2020-08-18 23:32:13,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:13,840 INFO L93 Difference]: Finished difference Result 420 states and 720 transitions. [2020-08-18 23:32:13,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:13,841 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 23:32:13,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:13,843 INFO L225 Difference]: With dead ends: 420 [2020-08-18 23:32:13,844 INFO L226 Difference]: Without dead ends: 286 [2020-08-18 23:32:13,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:13,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-18 23:32:13,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 284. [2020-08-18 23:32:13,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-08-18 23:32:13,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 482 transitions. [2020-08-18 23:32:13,870 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 482 transitions. Word has length 24 [2020-08-18 23:32:13,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:13,871 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 482 transitions. [2020-08-18 23:32:13,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:13,871 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 482 transitions. [2020-08-18 23:32:13,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 23:32:13,878 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:13,878 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] [2020-08-18 23:32:13,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 23:32:13,878 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:13,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:13,879 INFO L82 PathProgramCache]: Analyzing trace with hash 107285981, now seen corresponding path program 1 times [2020-08-18 23:32:13,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:13,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [101094943] [2020-08-18 23:32:13,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:13,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:13,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:13,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:13,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:13,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [101094943] [2020-08-18 23:32:13,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:13,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:13,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093111008] [2020-08-18 23:32:13,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:13,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:13,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:13,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:13,938 INFO L87 Difference]: Start difference. First operand 284 states and 482 transitions. Second operand 3 states. [2020-08-18 23:32:13,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:13,968 INFO L93 Difference]: Finished difference Result 524 states and 904 transitions. [2020-08-18 23:32:13,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:13,972 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 23:32:13,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:13,975 INFO L225 Difference]: With dead ends: 524 [2020-08-18 23:32:13,975 INFO L226 Difference]: Without dead ends: 522 [2020-08-18 23:32:13,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:13,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-08-18 23:32:13,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 392. [2020-08-18 23:32:13,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-08-18 23:32:13,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 654 transitions. [2020-08-18 23:32:13,996 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 654 transitions. Word has length 24 [2020-08-18 23:32:13,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:13,999 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 654 transitions. [2020-08-18 23:32:13,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:13,999 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 654 transitions. [2020-08-18 23:32:14,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 23:32:14,001 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:14,001 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] [2020-08-18 23:32:14,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 23:32:14,002 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:14,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:14,002 INFO L82 PathProgramCache]: Analyzing trace with hash -903831269, now seen corresponding path program 1 times [2020-08-18 23:32:14,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:14,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737293976] [2020-08-18 23:32:14,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:14,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:14,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:14,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:14,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:14,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737293976] [2020-08-18 23:32:14,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:14,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:14,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705326617] [2020-08-18 23:32:14,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:14,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:14,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:14,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:14,054 INFO L87 Difference]: Start difference. First operand 392 states and 654 transitions. Second operand 3 states. [2020-08-18 23:32:14,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:14,085 INFO L93 Difference]: Finished difference Result 924 states and 1552 transitions. [2020-08-18 23:32:14,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:14,086 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 23:32:14,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:14,090 INFO L225 Difference]: With dead ends: 924 [2020-08-18 23:32:14,090 INFO L226 Difference]: Without dead ends: 546 [2020-08-18 23:32:14,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:14,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-08-18 23:32:14,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 544. [2020-08-18 23:32:14,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2020-08-18 23:32:14,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 902 transitions. [2020-08-18 23:32:14,110 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 902 transitions. Word has length 24 [2020-08-18 23:32:14,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:14,110 INFO L479 AbstractCegarLoop]: Abstraction has 544 states and 902 transitions. [2020-08-18 23:32:14,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:14,111 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 902 transitions. [2020-08-18 23:32:14,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 23:32:14,112 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:14,112 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] [2020-08-18 23:32:14,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 23:32:14,113 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:14,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:14,113 INFO L82 PathProgramCache]: Analyzing trace with hash -968887806, now seen corresponding path program 1 times [2020-08-18 23:32:14,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:14,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509021953] [2020-08-18 23:32:14,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:14,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:14,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:14,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:14,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509021953] [2020-08-18 23:32:14,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:14,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:14,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811491788] [2020-08-18 23:32:14,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:14,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:14,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:14,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:14,141 INFO L87 Difference]: Start difference. First operand 544 states and 902 transitions. Second operand 3 states. [2020-08-18 23:32:14,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:14,162 INFO L93 Difference]: Finished difference Result 816 states and 1348 transitions. [2020-08-18 23:32:14,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:14,163 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 23:32:14,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:14,166 INFO L225 Difference]: With dead ends: 816 [2020-08-18 23:32:14,166 INFO L226 Difference]: Without dead ends: 554 [2020-08-18 23:32:14,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:14,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-18 23:32:14,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 552. [2020-08-18 23:32:14,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-08-18 23:32:14,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 902 transitions. [2020-08-18 23:32:14,184 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 902 transitions. Word has length 25 [2020-08-18 23:32:14,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:14,185 INFO L479 AbstractCegarLoop]: Abstraction has 552 states and 902 transitions. [2020-08-18 23:32:14,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:14,185 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 902 transitions. [2020-08-18 23:32:14,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 23:32:14,186 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:14,186 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] [2020-08-18 23:32:14,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 23:32:14,187 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:14,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:14,187 INFO L82 PathProgramCache]: Analyzing trace with hash 2046215812, now seen corresponding path program 1 times [2020-08-18 23:32:14,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:14,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [817502015] [2020-08-18 23:32:14,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:14,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:14,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:14,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:14,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:14,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [817502015] [2020-08-18 23:32:14,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:14,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:14,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043457603] [2020-08-18 23:32:14,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:14,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:14,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:14,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:14,215 INFO L87 Difference]: Start difference. First operand 552 states and 902 transitions. Second operand 3 states. [2020-08-18 23:32:14,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:14,239 INFO L93 Difference]: Finished difference Result 1004 states and 1672 transitions. [2020-08-18 23:32:14,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:14,240 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 23:32:14,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:14,245 INFO L225 Difference]: With dead ends: 1004 [2020-08-18 23:32:14,245 INFO L226 Difference]: Without dead ends: 1002 [2020-08-18 23:32:14,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:14,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2020-08-18 23:32:14,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 776. [2020-08-18 23:32:14,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-08-18 23:32:14,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1238 transitions. [2020-08-18 23:32:14,272 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1238 transitions. Word has length 25 [2020-08-18 23:32:14,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:14,273 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1238 transitions. [2020-08-18 23:32:14,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:14,273 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1238 transitions. [2020-08-18 23:32:14,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 23:32:14,275 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:14,275 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] [2020-08-18 23:32:14,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 23:32:14,275 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:14,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:14,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1035098562, now seen corresponding path program 1 times [2020-08-18 23:32:14,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:14,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159155598] [2020-08-18 23:32:14,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:14,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:14,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:14,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:14,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:14,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159155598] [2020-08-18 23:32:14,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:14,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:14,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254634792] [2020-08-18 23:32:14,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:14,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:14,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:14,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:14,304 INFO L87 Difference]: Start difference. First operand 776 states and 1238 transitions. Second operand 3 states. [2020-08-18 23:32:14,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:14,340 INFO L93 Difference]: Finished difference Result 1820 states and 2920 transitions. [2020-08-18 23:32:14,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:14,340 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 23:32:14,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:14,346 INFO L225 Difference]: With dead ends: 1820 [2020-08-18 23:32:14,347 INFO L226 Difference]: Without dead ends: 1066 [2020-08-18 23:32:14,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:14,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2020-08-18 23:32:14,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1064. [2020-08-18 23:32:14,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1064 states. [2020-08-18 23:32:14,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1686 transitions. [2020-08-18 23:32:14,385 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1686 transitions. Word has length 25 [2020-08-18 23:32:14,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:14,386 INFO L479 AbstractCegarLoop]: Abstraction has 1064 states and 1686 transitions. [2020-08-18 23:32:14,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:14,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1686 transitions. [2020-08-18 23:32:14,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 23:32:14,388 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:14,388 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:14,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 23:32:14,389 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:14,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:14,390 INFO L82 PathProgramCache]: Analyzing trace with hash -991604848, now seen corresponding path program 1 times [2020-08-18 23:32:14,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:14,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986014359] [2020-08-18 23:32:14,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:14,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:14,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:14,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:14,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:14,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986014359] [2020-08-18 23:32:14,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:14,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:14,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505806760] [2020-08-18 23:32:14,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:14,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:14,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:14,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:14,432 INFO L87 Difference]: Start difference. First operand 1064 states and 1686 transitions. Second operand 3 states. [2020-08-18 23:32:14,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:14,466 INFO L93 Difference]: Finished difference Result 1596 states and 2520 transitions. [2020-08-18 23:32:14,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:14,467 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 23:32:14,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:14,474 INFO L225 Difference]: With dead ends: 1596 [2020-08-18 23:32:14,474 INFO L226 Difference]: Without dead ends: 1082 [2020-08-18 23:32:14,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:14,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2020-08-18 23:32:14,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1080. [2020-08-18 23:32:14,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1080 states. [2020-08-18 23:32:14,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1686 transitions. [2020-08-18 23:32:14,518 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1686 transitions. Word has length 26 [2020-08-18 23:32:14,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:14,518 INFO L479 AbstractCegarLoop]: Abstraction has 1080 states and 1686 transitions. [2020-08-18 23:32:14,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:14,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1686 transitions. [2020-08-18 23:32:14,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 23:32:14,521 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:14,521 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:14,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 23:32:14,521 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:14,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:14,522 INFO L82 PathProgramCache]: Analyzing trace with hash 2023498770, now seen corresponding path program 1 times [2020-08-18 23:32:14,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:14,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381682122] [2020-08-18 23:32:14,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:14,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:14,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:14,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:14,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:14,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381682122] [2020-08-18 23:32:14,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:14,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:14,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408802017] [2020-08-18 23:32:14,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:14,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:14,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:14,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:14,555 INFO L87 Difference]: Start difference. First operand 1080 states and 1686 transitions. Second operand 3 states. [2020-08-18 23:32:14,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:14,604 INFO L93 Difference]: Finished difference Result 1932 states and 3080 transitions. [2020-08-18 23:32:14,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:14,604 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 23:32:14,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:14,618 INFO L225 Difference]: With dead ends: 1932 [2020-08-18 23:32:14,618 INFO L226 Difference]: Without dead ends: 1930 [2020-08-18 23:32:14,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:14,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-18 23:32:14,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1544. [2020-08-18 23:32:14,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-08-18 23:32:14,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2342 transitions. [2020-08-18 23:32:14,678 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2342 transitions. Word has length 26 [2020-08-18 23:32:14,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:14,678 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 2342 transitions. [2020-08-18 23:32:14,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:14,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2342 transitions. [2020-08-18 23:32:14,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 23:32:14,682 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:14,683 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:14,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 23:32:14,683 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:14,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:14,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1012381520, now seen corresponding path program 1 times [2020-08-18 23:32:14,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:14,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595789066] [2020-08-18 23:32:14,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:14,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:14,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:14,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:14,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:14,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1595789066] [2020-08-18 23:32:14,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:14,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:14,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792381988] [2020-08-18 23:32:14,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:14,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:14,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:14,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:14,715 INFO L87 Difference]: Start difference. First operand 1544 states and 2342 transitions. Second operand 3 states. [2020-08-18 23:32:14,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:14,784 INFO L93 Difference]: Finished difference Result 3596 states and 5480 transitions. [2020-08-18 23:32:14,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:14,785 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 23:32:14,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:14,797 INFO L225 Difference]: With dead ends: 3596 [2020-08-18 23:32:14,797 INFO L226 Difference]: Without dead ends: 2090 [2020-08-18 23:32:14,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:14,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2020-08-18 23:32:14,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2088. [2020-08-18 23:32:14,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2088 states. [2020-08-18 23:32:14,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3142 transitions. [2020-08-18 23:32:14,876 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3142 transitions. Word has length 26 [2020-08-18 23:32:14,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:14,877 INFO L479 AbstractCegarLoop]: Abstraction has 2088 states and 3142 transitions. [2020-08-18 23:32:14,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:14,877 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3142 transitions. [2020-08-18 23:32:14,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 23:32:14,880 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:14,881 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:14,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 23:32:14,881 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:14,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:14,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1695832809, now seen corresponding path program 1 times [2020-08-18 23:32:14,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:14,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583168412] [2020-08-18 23:32:14,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:14,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:14,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:14,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:14,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:14,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583168412] [2020-08-18 23:32:14,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:14,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:14,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384244850] [2020-08-18 23:32:14,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:14,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:14,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:14,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:14,906 INFO L87 Difference]: Start difference. First operand 2088 states and 3142 transitions. Second operand 3 states. [2020-08-18 23:32:14,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:14,955 INFO L93 Difference]: Finished difference Result 3132 states and 4696 transitions. [2020-08-18 23:32:14,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:14,956 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 23:32:14,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:14,966 INFO L225 Difference]: With dead ends: 3132 [2020-08-18 23:32:14,967 INFO L226 Difference]: Without dead ends: 2122 [2020-08-18 23:32:14,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:14,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2020-08-18 23:32:15,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 2120. [2020-08-18 23:32:15,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2120 states. [2020-08-18 23:32:15,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 3142 transitions. [2020-08-18 23:32:15,028 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 3142 transitions. Word has length 27 [2020-08-18 23:32:15,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:15,029 INFO L479 AbstractCegarLoop]: Abstraction has 2120 states and 3142 transitions. [2020-08-18 23:32:15,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:15,029 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 3142 transitions. [2020-08-18 23:32:15,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 23:32:15,032 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:15,032 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:15,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 23:32:15,032 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:15,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:15,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1319270809, now seen corresponding path program 1 times [2020-08-18 23:32:15,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:15,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050906401] [2020-08-18 23:32:15,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:15,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:15,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:15,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:15,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:15,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050906401] [2020-08-18 23:32:15,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:15,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:15,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400833855] [2020-08-18 23:32:15,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:15,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:15,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:15,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:15,091 INFO L87 Difference]: Start difference. First operand 2120 states and 3142 transitions. Second operand 3 states. [2020-08-18 23:32:15,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:15,149 INFO L93 Difference]: Finished difference Result 3724 states and 5640 transitions. [2020-08-18 23:32:15,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:15,150 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 23:32:15,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:15,167 INFO L225 Difference]: With dead ends: 3724 [2020-08-18 23:32:15,167 INFO L226 Difference]: Without dead ends: 3722 [2020-08-18 23:32:15,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:15,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-18 23:32:15,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3080. [2020-08-18 23:32:15,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3080 states. [2020-08-18 23:32:15,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 4422 transitions. [2020-08-18 23:32:15,252 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 4422 transitions. Word has length 27 [2020-08-18 23:32:15,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:15,252 INFO L479 AbstractCegarLoop]: Abstraction has 3080 states and 4422 transitions. [2020-08-18 23:32:15,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:15,253 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 4422 transitions. [2020-08-18 23:32:15,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 23:32:15,257 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:15,257 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:15,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 23:32:15,258 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:15,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:15,258 INFO L82 PathProgramCache]: Analyzing trace with hash 308153559, now seen corresponding path program 1 times [2020-08-18 23:32:15,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:15,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430055828] [2020-08-18 23:32:15,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:15,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:15,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:15,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:15,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:15,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430055828] [2020-08-18 23:32:15,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:15,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:15,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409925419] [2020-08-18 23:32:15,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:15,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:15,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:15,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:15,295 INFO L87 Difference]: Start difference. First operand 3080 states and 4422 transitions. Second operand 3 states. [2020-08-18 23:32:15,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:15,372 INFO L93 Difference]: Finished difference Result 7116 states and 10248 transitions. [2020-08-18 23:32:15,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:15,373 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 23:32:15,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:15,392 INFO L225 Difference]: With dead ends: 7116 [2020-08-18 23:32:15,392 INFO L226 Difference]: Without dead ends: 4106 [2020-08-18 23:32:15,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:15,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2020-08-18 23:32:15,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 4104. [2020-08-18 23:32:15,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4104 states. [2020-08-18 23:32:15,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4104 states to 4104 states and 5830 transitions. [2020-08-18 23:32:15,512 INFO L78 Accepts]: Start accepts. Automaton has 4104 states and 5830 transitions. Word has length 27 [2020-08-18 23:32:15,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:15,513 INFO L479 AbstractCegarLoop]: Abstraction has 4104 states and 5830 transitions. [2020-08-18 23:32:15,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:15,513 INFO L276 IsEmpty]: Start isEmpty. Operand 4104 states and 5830 transitions. [2020-08-18 23:32:15,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 23:32:15,518 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:15,518 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:15,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 23:32:15,521 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:15,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:15,521 INFO L82 PathProgramCache]: Analyzing trace with hash -2052062779, now seen corresponding path program 1 times [2020-08-18 23:32:15,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:15,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838300556] [2020-08-18 23:32:15,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:15,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:15,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:15,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:15,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:15,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838300556] [2020-08-18 23:32:15,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:15,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:15,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902986204] [2020-08-18 23:32:15,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:15,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:15,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:15,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:15,582 INFO L87 Difference]: Start difference. First operand 4104 states and 5830 transitions. Second operand 3 states. [2020-08-18 23:32:15,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:15,652 INFO L93 Difference]: Finished difference Result 6156 states and 8712 transitions. [2020-08-18 23:32:15,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:15,653 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-18 23:32:15,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:15,693 INFO L225 Difference]: With dead ends: 6156 [2020-08-18 23:32:15,693 INFO L226 Difference]: Without dead ends: 4170 [2020-08-18 23:32:15,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:15,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2020-08-18 23:32:15,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 4168. [2020-08-18 23:32:15,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4168 states. [2020-08-18 23:32:15,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4168 states to 4168 states and 5830 transitions. [2020-08-18 23:32:15,815 INFO L78 Accepts]: Start accepts. Automaton has 4168 states and 5830 transitions. Word has length 28 [2020-08-18 23:32:15,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:15,815 INFO L479 AbstractCegarLoop]: Abstraction has 4168 states and 5830 transitions. [2020-08-18 23:32:15,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:15,815 INFO L276 IsEmpty]: Start isEmpty. Operand 4168 states and 5830 transitions. [2020-08-18 23:32:15,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 23:32:15,821 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:15,821 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:15,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 23:32:15,821 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:15,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:15,822 INFO L82 PathProgramCache]: Analyzing trace with hash 963040839, now seen corresponding path program 1 times [2020-08-18 23:32:15,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:15,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784871369] [2020-08-18 23:32:15,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:15,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:15,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:15,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:15,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:15,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784871369] [2020-08-18 23:32:15,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:15,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:15,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809786409] [2020-08-18 23:32:15,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:15,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:15,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:15,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:15,854 INFO L87 Difference]: Start difference. First operand 4168 states and 5830 transitions. Second operand 3 states. [2020-08-18 23:32:15,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:15,967 INFO L93 Difference]: Finished difference Result 12108 states and 16712 transitions. [2020-08-18 23:32:15,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:15,967 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-18 23:32:15,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:15,988 INFO L225 Difference]: With dead ends: 12108 [2020-08-18 23:32:15,988 INFO L226 Difference]: Without dead ends: 8074 [2020-08-18 23:32:15,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:16,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-18 23:32:16,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 8072. [2020-08-18 23:32:16,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-18 23:32:16,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10886 transitions. [2020-08-18 23:32:16,358 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10886 transitions. Word has length 28 [2020-08-18 23:32:16,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:16,359 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10886 transitions. [2020-08-18 23:32:16,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:16,359 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10886 transitions. [2020-08-18 23:32:16,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 23:32:16,372 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:16,372 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:16,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 23:32:16,373 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:16,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:16,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1974158089, now seen corresponding path program 1 times [2020-08-18 23:32:16,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:16,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223448018] [2020-08-18 23:32:16,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:16,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:16,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:16,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:16,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:16,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223448018] [2020-08-18 23:32:16,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:16,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:16,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370525273] [2020-08-18 23:32:16,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:16,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:16,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:16,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:16,400 INFO L87 Difference]: Start difference. First operand 8072 states and 10886 transitions. Second operand 3 states. [2020-08-18 23:32:16,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:16,568 INFO L93 Difference]: Finished difference Result 9100 states and 12680 transitions. [2020-08-18 23:32:16,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:16,569 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-18 23:32:16,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:16,592 INFO L225 Difference]: With dead ends: 9100 [2020-08-18 23:32:16,593 INFO L226 Difference]: Without dead ends: 9098 [2020-08-18 23:32:16,597 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 [2020-08-18 23:32:16,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9098 states. [2020-08-18 23:32:16,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9098 to 8072. [2020-08-18 23:32:16,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-18 23:32:16,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10758 transitions. [2020-08-18 23:32:16,902 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10758 transitions. Word has length 28 [2020-08-18 23:32:16,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:16,903 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10758 transitions. [2020-08-18 23:32:16,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:16,903 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10758 transitions. [2020-08-18 23:32:16,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 23:32:16,916 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:16,916 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:16,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 23:32:16,917 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:16,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:16,917 INFO L82 PathProgramCache]: Analyzing trace with hash -210289620, now seen corresponding path program 1 times [2020-08-18 23:32:16,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:16,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128126968] [2020-08-18 23:32:16,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:16,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:16,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:16,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:16,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:16,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128126968] [2020-08-18 23:32:16,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:16,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:16,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138161869] [2020-08-18 23:32:16,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:16,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:16,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:16,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:16,955 INFO L87 Difference]: Start difference. First operand 8072 states and 10758 transitions. Second operand 3 states. [2020-08-18 23:32:17,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:17,232 INFO L93 Difference]: Finished difference Result 13708 states and 18568 transitions. [2020-08-18 23:32:17,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:17,232 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-18 23:32:17,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:17,260 INFO L225 Difference]: With dead ends: 13708 [2020-08-18 23:32:17,261 INFO L226 Difference]: Without dead ends: 13706 [2020-08-18 23:32:17,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:17,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13706 states. [2020-08-18 23:32:17,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13706 to 12168. [2020-08-18 23:32:17,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12168 states. [2020-08-18 23:32:17,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12168 states to 12168 states and 15750 transitions. [2020-08-18 23:32:17,521 INFO L78 Accepts]: Start accepts. Automaton has 12168 states and 15750 transitions. Word has length 29 [2020-08-18 23:32:17,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:17,522 INFO L479 AbstractCegarLoop]: Abstraction has 12168 states and 15750 transitions. [2020-08-18 23:32:17,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:17,522 INFO L276 IsEmpty]: Start isEmpty. Operand 12168 states and 15750 transitions. [2020-08-18 23:32:17,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 23:32:17,541 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:17,541 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:17,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-18 23:32:17,542 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:17,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:17,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1221406870, now seen corresponding path program 1 times [2020-08-18 23:32:17,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:17,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242133042] [2020-08-18 23:32:17,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:17,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:17,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:17,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:17,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:17,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242133042] [2020-08-18 23:32:17,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:17,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:17,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281440974] [2020-08-18 23:32:17,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:17,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:17,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:17,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:17,580 INFO L87 Difference]: Start difference. First operand 12168 states and 15750 transitions. Second operand 3 states. [2020-08-18 23:32:17,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:17,907 INFO L93 Difference]: Finished difference Result 27788 states and 35976 transitions. [2020-08-18 23:32:17,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:17,907 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-18 23:32:17,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:17,939 INFO L225 Difference]: With dead ends: 27788 [2020-08-18 23:32:17,939 INFO L226 Difference]: Without dead ends: 15754 [2020-08-18 23:32:17,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:17,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15754 states. [2020-08-18 23:32:18,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15754 to 15752. [2020-08-18 23:32:18,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15752 states. [2020-08-18 23:32:18,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15752 states to 15752 states and 19974 transitions. [2020-08-18 23:32:18,307 INFO L78 Accepts]: Start accepts. Automaton has 15752 states and 19974 transitions. Word has length 29 [2020-08-18 23:32:18,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:18,308 INFO L479 AbstractCegarLoop]: Abstraction has 15752 states and 19974 transitions. [2020-08-18 23:32:18,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:18,308 INFO L276 IsEmpty]: Start isEmpty. Operand 15752 states and 19974 transitions. [2020-08-18 23:32:18,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 23:32:18,327 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:18,327 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:18,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-18 23:32:18,328 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:18,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:18,328 INFO L82 PathProgramCache]: Analyzing trace with hash 2071172156, now seen corresponding path program 1 times [2020-08-18 23:32:18,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:18,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687777830] [2020-08-18 23:32:18,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:18,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:18,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:18,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:18,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:18,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687777830] [2020-08-18 23:32:18,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:18,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:18,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514821616] [2020-08-18 23:32:18,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:18,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:18,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:18,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:18,354 INFO L87 Difference]: Start difference. First operand 15752 states and 19974 transitions. Second operand 3 states. [2020-08-18 23:32:18,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:18,919 INFO L93 Difference]: Finished difference Result 23820 states and 30216 transitions. [2020-08-18 23:32:18,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:18,920 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-18 23:32:18,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:18,949 INFO L225 Difference]: With dead ends: 23820 [2020-08-18 23:32:18,950 INFO L226 Difference]: Without dead ends: 16138 [2020-08-18 23:32:18,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:18,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16138 states. [2020-08-18 23:32:19,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16138 to 16136. [2020-08-18 23:32:19,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16136 states. [2020-08-18 23:32:19,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16136 states to 16136 states and 20230 transitions. [2020-08-18 23:32:19,256 INFO L78 Accepts]: Start accepts. Automaton has 16136 states and 20230 transitions. Word has length 30 [2020-08-18 23:32:19,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:19,256 INFO L479 AbstractCegarLoop]: Abstraction has 16136 states and 20230 transitions. [2020-08-18 23:32:19,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:19,256 INFO L276 IsEmpty]: Start isEmpty. Operand 16136 states and 20230 transitions. [2020-08-18 23:32:19,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 23:32:19,275 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:19,275 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:19,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-18 23:32:19,275 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:19,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:19,276 INFO L82 PathProgramCache]: Analyzing trace with hash 791308478, now seen corresponding path program 1 times [2020-08-18 23:32:19,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:19,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238732366] [2020-08-18 23:32:19,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:19,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:19,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:19,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:19,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:19,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238732366] [2020-08-18 23:32:19,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:19,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:19,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622125470] [2020-08-18 23:32:19,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:19,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:19,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:19,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:19,302 INFO L87 Difference]: Start difference. First operand 16136 states and 20230 transitions. Second operand 3 states. [2020-08-18 23:32:19,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:19,662 INFO L93 Difference]: Finished difference Result 26636 states and 33544 transitions. [2020-08-18 23:32:19,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:19,663 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-18 23:32:19,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:19,708 INFO L225 Difference]: With dead ends: 26636 [2020-08-18 23:32:19,708 INFO L226 Difference]: Without dead ends: 26634 [2020-08-18 23:32:19,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:19,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26634 states. [2020-08-18 23:32:20,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26634 to 24584. [2020-08-18 23:32:20,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24584 states. [2020-08-18 23:32:20,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24584 states to 24584 states and 29958 transitions. [2020-08-18 23:32:20,155 INFO L78 Accepts]: Start accepts. Automaton has 24584 states and 29958 transitions. Word has length 30 [2020-08-18 23:32:20,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:20,155 INFO L479 AbstractCegarLoop]: Abstraction has 24584 states and 29958 transitions. [2020-08-18 23:32:20,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:20,155 INFO L276 IsEmpty]: Start isEmpty. Operand 24584 states and 29958 transitions. [2020-08-18 23:32:20,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 23:32:20,193 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:20,193 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:20,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-18 23:32:20,193 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:20,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:20,194 INFO L82 PathProgramCache]: Analyzing trace with hash -219808772, now seen corresponding path program 1 times [2020-08-18 23:32:20,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:20,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424315658] [2020-08-18 23:32:20,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:20,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:20,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:20,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:20,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:20,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424315658] [2020-08-18 23:32:20,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:20,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:20,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605917217] [2020-08-18 23:32:20,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:20,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:20,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:20,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:20,215 INFO L87 Difference]: Start difference. First operand 24584 states and 29958 transitions. Second operand 3 states. [2020-08-18 23:32:20,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:20,624 INFO L93 Difference]: Finished difference Result 55308 states and 66824 transitions. [2020-08-18 23:32:20,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:20,625 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-18 23:32:20,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:20,685 INFO L225 Difference]: With dead ends: 55308 [2020-08-18 23:32:20,686 INFO L226 Difference]: Without dead ends: 31242 [2020-08-18 23:32:20,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:20,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31242 states. [2020-08-18 23:32:21,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31242 to 31240. [2020-08-18 23:32:21,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31240 states. [2020-08-18 23:32:21,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31240 states to 31240 states and 36870 transitions. [2020-08-18 23:32:21,523 INFO L78 Accepts]: Start accepts. Automaton has 31240 states and 36870 transitions. Word has length 30 [2020-08-18 23:32:21,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:21,524 INFO L479 AbstractCegarLoop]: Abstraction has 31240 states and 36870 transitions. [2020-08-18 23:32:21,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:21,524 INFO L276 IsEmpty]: Start isEmpty. Operand 31240 states and 36870 transitions. [2020-08-18 23:32:21,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 23:32:21,553 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:21,554 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:21,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-18 23:32:21,554 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:21,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:21,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1239024833, now seen corresponding path program 1 times [2020-08-18 23:32:21,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:21,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954788483] [2020-08-18 23:32:21,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:21,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:21,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:21,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:21,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:21,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954788483] [2020-08-18 23:32:21,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:21,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:21,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651613644] [2020-08-18 23:32:21,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:21,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:21,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:21,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:21,584 INFO L87 Difference]: Start difference. First operand 31240 states and 36870 transitions. Second operand 3 states. [2020-08-18 23:32:21,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:21,927 INFO L93 Difference]: Finished difference Result 46860 states and 55048 transitions. [2020-08-18 23:32:21,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:21,928 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-18 23:32:21,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:21,986 INFO L225 Difference]: With dead ends: 46860 [2020-08-18 23:32:21,986 INFO L226 Difference]: Without dead ends: 31754 [2020-08-18 23:32:22,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:22,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31754 states. [2020-08-18 23:32:23,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31754 to 31752. [2020-08-18 23:32:23,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31752 states. [2020-08-18 23:32:23,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31752 states to 31752 states and 36870 transitions. [2020-08-18 23:32:23,390 INFO L78 Accepts]: Start accepts. Automaton has 31752 states and 36870 transitions. Word has length 31 [2020-08-18 23:32:23,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:23,390 INFO L479 AbstractCegarLoop]: Abstraction has 31752 states and 36870 transitions. [2020-08-18 23:32:23,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:23,390 INFO L276 IsEmpty]: Start isEmpty. Operand 31752 states and 36870 transitions. [2020-08-18 23:32:23,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 23:32:23,433 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:23,433 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:23,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-18 23:32:23,434 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:23,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:23,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1776078785, now seen corresponding path program 1 times [2020-08-18 23:32:23,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:23,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575446316] [2020-08-18 23:32:23,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:23,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:23,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:23,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:23,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:23,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575446316] [2020-08-18 23:32:23,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:23,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:23,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681046823] [2020-08-18 23:32:23,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:23,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:23,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:23,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:23,462 INFO L87 Difference]: Start difference. First operand 31752 states and 36870 transitions. Second operand 3 states. [2020-08-18 23:32:23,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:23,873 INFO L93 Difference]: Finished difference Result 51210 states and 58887 transitions. [2020-08-18 23:32:23,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:23,874 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-18 23:32:23,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:23,926 INFO L225 Difference]: With dead ends: 51210 [2020-08-18 23:32:23,926 INFO L226 Difference]: Without dead ends: 51208 [2020-08-18 23:32:23,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:23,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51208 states. [2020-08-18 23:32:24,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51208 to 49160. [2020-08-18 23:32:24,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49160 states. [2020-08-18 23:32:24,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49160 states to 49160 states and 55814 transitions. [2020-08-18 23:32:24,806 INFO L78 Accepts]: Start accepts. Automaton has 49160 states and 55814 transitions. Word has length 31 [2020-08-18 23:32:24,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:24,806 INFO L479 AbstractCegarLoop]: Abstraction has 49160 states and 55814 transitions. [2020-08-18 23:32:24,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:24,807 INFO L276 IsEmpty]: Start isEmpty. Operand 49160 states and 55814 transitions. [2020-08-18 23:32:24,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 23:32:24,842 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:32:24,842 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:32:24,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-18 23:32:24,843 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:32:24,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:32:24,843 INFO L82 PathProgramCache]: Analyzing trace with hash 764961535, now seen corresponding path program 1 times [2020-08-18 23:32:24,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:32:24,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625288757] [2020-08-18 23:32:24,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:32:24,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:24,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:32:24,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:32:24,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:32:24,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625288757] [2020-08-18 23:32:24,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:32:24,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:32:24,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446329137] [2020-08-18 23:32:24,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:32:24,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:32:24,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:32:24,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:24,866 INFO L87 Difference]: Start difference. First operand 49160 states and 55814 transitions. Second operand 3 states. [2020-08-18 23:32:25,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:32:25,339 INFO L93 Difference]: Finished difference Result 109576 states and 122374 transitions. [2020-08-18 23:32:25,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:32:25,340 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-18 23:32:25,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:32:25,340 INFO L225 Difference]: With dead ends: 109576 [2020-08-18 23:32:25,340 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 23:32:25,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:32:25,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 23:32:25,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 23:32:25,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 23:32:25,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 23:32:25,434 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-08-18 23:32:25,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:32:25,434 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 23:32:25,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:32:25,434 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 23:32:25,435 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 23:32:25,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-18 23:32:25,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 23:32:25,469 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 23:32:25,469 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 23:32:25,469 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 23:32:25,469 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 23:32:25,469 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 23:32:25,469 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 23:32:25,470 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 177) no Hoare annotation was computed. [2020-08-18 23:32:25,470 INFO L268 CegarLoopResult]: For program point L118(line 118) no Hoare annotation was computed. [2020-08-18 23:32:25,470 INFO L268 CegarLoopResult]: For program point L143(line 143) no Hoare annotation was computed. [2020-08-18 23:32:25,470 INFO L268 CegarLoopResult]: For program point L44(lines 44 46) no Hoare annotation was computed. [2020-08-18 23:32:25,470 INFO L268 CegarLoopResult]: For program point L168(line 168) no Hoare annotation was computed. [2020-08-18 23:32:25,470 INFO L264 CegarLoopResult]: At program point L168-1(lines 5 177) the Hoare annotation is: false [2020-08-18 23:32:25,470 INFO L268 CegarLoopResult]: For program point L127-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 23:32:25,470 INFO L268 CegarLoopResult]: For program point L152-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 23:32:25,471 INFO L268 CegarLoopResult]: For program point L111-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 23:32:25,471 INFO L268 CegarLoopResult]: For program point L103-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 23:32:25,471 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-08-18 23:32:25,471 INFO L268 CegarLoopResult]: For program point L95-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 23:32:25,471 INFO L268 CegarLoopResult]: For program point L153(line 153) no Hoare annotation was computed. [2020-08-18 23:32:25,471 INFO L268 CegarLoopResult]: For program point L87-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 23:32:25,471 INFO L268 CegarLoopResult]: For program point L79-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 23:32:25,471 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 177) no Hoare annotation was computed. [2020-08-18 23:32:25,472 INFO L268 CegarLoopResult]: For program point L137-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 23:32:25,472 INFO L268 CegarLoopResult]: For program point L71(lines 71 73) no Hoare annotation was computed. [2020-08-18 23:32:25,472 INFO L268 CegarLoopResult]: For program point L71-2(lines 42 172) no Hoare annotation was computed. [2020-08-18 23:32:25,472 INFO L268 CegarLoopResult]: For program point L162-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 23:32:25,472 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 175) no Hoare annotation was computed. [2020-08-18 23:32:25,472 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 177) the Hoare annotation is: true [2020-08-18 23:32:25,472 INFO L268 CegarLoopResult]: For program point L138(line 138) no Hoare annotation was computed. [2020-08-18 23:32:25,473 INFO L268 CegarLoopResult]: For program point L163(line 163) no Hoare annotation was computed. [2020-08-18 23:32:25,473 INFO L268 CegarLoopResult]: For program point L122-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 23:32:25,473 INFO L268 CegarLoopResult]: For program point L147-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 23:32:25,473 INFO L268 CegarLoopResult]: For program point L123(line 123) no Hoare annotation was computed. [2020-08-18 23:32:25,473 INFO L268 CegarLoopResult]: For program point L148(line 148) no Hoare annotation was computed. [2020-08-18 23:32:25,473 INFO L271 CegarLoopResult]: At program point L173(lines 5 177) the Hoare annotation is: true [2020-08-18 23:32:25,473 INFO L268 CegarLoopResult]: For program point L107-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 23:32:25,473 INFO L268 CegarLoopResult]: For program point L132-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 23:32:25,473 INFO L268 CegarLoopResult]: For program point L99-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 23:32:25,474 INFO L268 CegarLoopResult]: For program point L157-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 23:32:25,474 INFO L268 CegarLoopResult]: For program point L91-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 23:32:25,474 INFO L268 CegarLoopResult]: For program point L83-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 23:32:25,474 INFO L268 CegarLoopResult]: For program point L75-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 23:32:25,474 INFO L268 CegarLoopResult]: For program point L133(line 133) no Hoare annotation was computed. [2020-08-18 23:32:25,474 INFO L268 CegarLoopResult]: For program point L158(line 158) no Hoare annotation was computed. [2020-08-18 23:32:25,474 INFO L268 CegarLoopResult]: For program point L117-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 23:32:25,474 INFO L268 CegarLoopResult]: For program point L142-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 23:32:25,474 INFO L271 CegarLoopResult]: At program point L167-1(lines 42 172) the Hoare annotation is: true [2020-08-18 23:32:25,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 11:32:25 BoogieIcfgContainer [2020-08-18 23:32:25,487 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 23:32:25,490 INFO L168 Benchmark]: Toolchain (without parser) took 13980.07 ms. Allocated memory was 140.0 MB in the beginning and 1.0 GB in the end (delta: 887.1 MB). Free memory was 103.6 MB in the beginning and 243.4 MB in the end (delta: -139.8 MB). Peak memory consumption was 747.3 MB. Max. memory is 7.1 GB. [2020-08-18 23:32:25,491 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 23:32:25,491 INFO L168 Benchmark]: CACSL2BoogieTranslator took 368.32 ms. Allocated memory is still 140.0 MB. Free memory was 103.4 MB in the beginning and 92.4 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-08-18 23:32:25,492 INFO L168 Benchmark]: Boogie Preprocessor took 116.18 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 92.4 MB in the beginning and 180.2 MB in the end (delta: -87.8 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-08-18 23:32:25,492 INFO L168 Benchmark]: RCFGBuilder took 380.03 ms. Allocated memory is still 202.9 MB. Free memory was 179.8 MB in the beginning and 159.6 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. [2020-08-18 23:32:25,493 INFO L168 Benchmark]: TraceAbstraction took 13110.24 ms. Allocated memory was 202.9 MB in the beginning and 1.0 GB in the end (delta: 824.2 MB). Free memory was 159.6 MB in the beginning and 243.4 MB in the end (delta: -83.8 MB). Peak memory consumption was 740.4 MB. Max. memory is 7.1 GB. [2020-08-18 23:32:25,495 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 368.32 ms. Allocated memory is still 140.0 MB. Free memory was 103.4 MB in the beginning and 92.4 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.18 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 92.4 MB in the beginning and 180.2 MB in the end (delta: -87.8 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 380.03 ms. Allocated memory is still 202.9 MB. Free memory was 179.8 MB in the beginning and 159.6 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13110.24 ms. Allocated memory was 202.9 MB in the beginning and 1.0 GB in the end (delta: 824.2 MB). Free memory was 159.6 MB in the beginning and 243.4 MB in the end (delta: -83.8 MB). Peak memory consumption was 740.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 175]: 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: 42]: 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, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 12.9s, OverallIterations: 31, TraceHistogramMax: 1, AutomataDifference: 5.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2877 SDtfs, 1405 SDslu, 1967 SDs, 0 SdLazy, 165 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 155 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49160occurred in iteration=30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.8s AutomataMinimizationTime, 31 MinimizatonAttempts, 8224 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 2058 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 808 NumberOfCodeBlocks, 808 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 777 ConstructedInterpolants, 0 QuantifiedInterpolants, 39912 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 31 InterpolantComputations, 31 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...