/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 13:25:32,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 13:25:32,250 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 13:25:32,293 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 13:25:32,294 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 13:25:32,305 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 13:25:32,307 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 13:25:32,310 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 13:25:32,312 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 13:25:32,314 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 13:25:32,315 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 13:25:32,318 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 13:25:32,318 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 13:25:32,321 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 13:25:32,322 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 13:25:32,326 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 13:25:32,327 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 13:25:32,327 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 13:25:32,330 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 13:25:32,337 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 13:25:32,340 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 13:25:32,342 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 13:25:32,345 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 13:25:32,345 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 13:25:32,350 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 13:25:32,361 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 13:25:32,362 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 13:25:32,364 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 13:25:32,365 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 13:25:32,411 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 13:25:32,411 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 13:25:32,413 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 13:25:32,413 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 13:25:32,413 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 13:25:32,414 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 13:25:32,414 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 13:25:32,414 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 13:25:32,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 13:25:32,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 13:25:32,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 13:25:32,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 13:25:32,416 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 13:25:32,417 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 13:25:32,417 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 13:25:32,417 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 13:25:32,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 13:25:32,418 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 13:25:32,418 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 13:25:32,418 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 13:25:32,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 13:25:32,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 13:25:32,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 13:25:32,419 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 13:25:32,419 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 13:25:32,419 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 13:25:32,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 13:25:32,419 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 13:25:32,420 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 13:25:32,420 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-08-21 13:25:32,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 13:25:32,748 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 13:25:32,753 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 13:25:32,755 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 13:25:32,755 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 13:25:32,756 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-08-21 13:25:32,839 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/04e208c7b/55b7b19d4e164e3aab73d86eb9a3b409/FLAG839d5b985 [2020-08-21 13:25:33,303 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 13:25:33,304 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-08-21 13:25:33,310 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/04e208c7b/55b7b19d4e164e3aab73d86eb9a3b409/FLAG839d5b985 [2020-08-21 13:25:33,714 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/04e208c7b/55b7b19d4e164e3aab73d86eb9a3b409 [2020-08-21 13:25:33,722 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 13:25:33,723 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 13:25:33,724 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 13:25:33,724 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 13:25:33,728 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 13:25:33,729 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:25:33" (1/1) ... [2020-08-21 13:25:33,732 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7be095dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:25:33, skipping insertion in model container [2020-08-21 13:25:33,732 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:25:33" (1/1) ... [2020-08-21 13:25:33,740 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 13:25:33,759 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 13:25:33,988 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:25:33,997 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 13:25:34,024 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:25:34,124 INFO L208 MainTranslator]: Completed translation [2020-08-21 13:25:34,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:25:34 WrapperNode [2020-08-21 13:25:34,125 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 13:25:34,126 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 13:25:34,126 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 13:25:34,126 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 13:25:34,136 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:25:34" (1/1) ... [2020-08-21 13:25:34,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:25:34" (1/1) ... [2020-08-21 13:25:34,145 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:25:34" (1/1) ... [2020-08-21 13:25:34,146 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:25:34" (1/1) ... [2020-08-21 13:25:34,155 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:25:34" (1/1) ... [2020-08-21 13:25:34,163 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:25:34" (1/1) ... [2020-08-21 13:25:34,166 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:25:34" (1/1) ... [2020-08-21 13:25:34,169 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 13:25:34,169 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 13:25:34,169 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 13:25:34,169 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 13:25:34,170 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:25:34" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 13:25:34,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 13:25:34,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 13:25:34,233 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 13:25:34,233 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2020-08-21 13:25:34,234 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2020-08-21 13:25:34,234 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 13:25:34,234 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 13:25:34,234 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 13:25:34,234 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 13:25:34,234 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2020-08-21 13:25:34,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 13:25:34,235 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2020-08-21 13:25:34,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 13:25:34,235 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 13:25:34,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 13:25:34,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 13:25:34,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 13:25:34,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 13:25:34,621 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 13:25:34,621 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-08-21 13:25:34,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:25:34 BoogieIcfgContainer [2020-08-21 13:25:34,626 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 13:25:34,629 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 13:25:34,629 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 13:25:34,632 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 13:25:34,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 01:25:33" (1/3) ... [2020-08-21 13:25:34,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b0ed9d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:25:34, skipping insertion in model container [2020-08-21 13:25:34,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:25:34" (2/3) ... [2020-08-21 13:25:34,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b0ed9d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:25:34, skipping insertion in model container [2020-08-21 13:25:34,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:25:34" (3/3) ... [2020-08-21 13:25:34,636 INFO L109 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_trivial_ground.i [2020-08-21 13:25:34,647 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 13:25:34,653 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 13:25:34,666 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 13:25:34,688 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 13:25:34,688 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 13:25:34,689 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 13:25:34,689 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 13:25:34,689 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 13:25:34,689 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 13:25:34,689 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 13:25:34,690 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 13:25:34,710 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-08-21 13:25:34,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 13:25:34,716 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:25:34,717 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:25:34,717 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:25:34,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:25:34,723 INFO L82 PathProgramCache]: Analyzing trace with hash 528217166, now seen corresponding path program 1 times [2020-08-21 13:25:34,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:25:34,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922136630] [2020-08-21 13:25:34,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:25:34,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:34,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:25:34,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:34,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:25:34,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922136630] [2020-08-21 13:25:34,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:25:34,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 13:25:34,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142763825] [2020-08-21 13:25:34,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 13:25:34,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:25:34,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 13:25:34,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 13:25:34,977 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 4 states. [2020-08-21 13:25:35,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:25:35,275 INFO L93 Difference]: Finished difference Result 150 states and 228 transitions. [2020-08-21 13:25:35,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 13:25:35,277 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-08-21 13:25:35,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:25:35,288 INFO L225 Difference]: With dead ends: 150 [2020-08-21 13:25:35,289 INFO L226 Difference]: Without dead ends: 89 [2020-08-21 13:25:35,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 13:25:35,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-21 13:25:35,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2020-08-21 13:25:35,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-21 13:25:35,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2020-08-21 13:25:35,350 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 14 [2020-08-21 13:25:35,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:25:35,350 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2020-08-21 13:25:35,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 13:25:35,351 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2020-08-21 13:25:35,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 13:25:35,352 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:25:35,352 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:25:35,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 13:25:35,353 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:25:35,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:25:35,353 INFO L82 PathProgramCache]: Analyzing trace with hash 396779504, now seen corresponding path program 1 times [2020-08-21 13:25:35,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:25:35,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137758761] [2020-08-21 13:25:35,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:25:35,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:35,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:25:35,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:35,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:25:35,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137758761] [2020-08-21 13:25:35,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:25:35,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 13:25:35,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428697011] [2020-08-21 13:25:35,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 13:25:35,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:25:35,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 13:25:35,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 13:25:35,424 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand 5 states. [2020-08-21 13:25:35,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:25:35,731 INFO L93 Difference]: Finished difference Result 170 states and 222 transitions. [2020-08-21 13:25:35,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 13:25:35,732 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-21 13:25:35,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:25:35,734 INFO L225 Difference]: With dead ends: 170 [2020-08-21 13:25:35,734 INFO L226 Difference]: Without dead ends: 122 [2020-08-21 13:25:35,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 13:25:35,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-21 13:25:35,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 59. [2020-08-21 13:25:35,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-21 13:25:35,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2020-08-21 13:25:35,750 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 16 [2020-08-21 13:25:35,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:25:35,750 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2020-08-21 13:25:35,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 13:25:35,750 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2020-08-21 13:25:35,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 13:25:35,751 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:25:35,752 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:25:35,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 13:25:35,752 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:25:35,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:25:35,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1360762094, now seen corresponding path program 2 times [2020-08-21 13:25:35,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:25:35,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248874667] [2020-08-21 13:25:35,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:25:35,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:35,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:25:35,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:35,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:25:35,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248874667] [2020-08-21 13:25:35,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:25:35,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 13:25:35,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325140549] [2020-08-21 13:25:35,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 13:25:35,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:25:35,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 13:25:35,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-21 13:25:35,837 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand 6 states. [2020-08-21 13:25:36,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:25:36,151 INFO L93 Difference]: Finished difference Result 203 states and 268 transitions. [2020-08-21 13:25:36,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 13:25:36,152 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-08-21 13:25:36,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:25:36,155 INFO L225 Difference]: With dead ends: 203 [2020-08-21 13:25:36,155 INFO L226 Difference]: Without dead ends: 155 [2020-08-21 13:25:36,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-21 13:25:36,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-21 13:25:36,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 61. [2020-08-21 13:25:36,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-21 13:25:36,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2020-08-21 13:25:36,170 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 18 [2020-08-21 13:25:36,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:25:36,171 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2020-08-21 13:25:36,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 13:25:36,171 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2020-08-21 13:25:36,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 13:25:36,172 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:25:36,172 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:25:36,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 13:25:36,173 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:25:36,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:25:36,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1858876852, now seen corresponding path program 3 times [2020-08-21 13:25:36,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:25:36,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210417488] [2020-08-21 13:25:36,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:25:36,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:36,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:25:36,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:36,270 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:25:36,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210417488] [2020-08-21 13:25:36,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:25:36,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 13:25:36,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131542058] [2020-08-21 13:25:36,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 13:25:36,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:25:36,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 13:25:36,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-21 13:25:36,273 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand 7 states. [2020-08-21 13:25:36,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:25:36,658 INFO L93 Difference]: Finished difference Result 236 states and 314 transitions. [2020-08-21 13:25:36,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 13:25:36,659 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-08-21 13:25:36,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:25:36,661 INFO L225 Difference]: With dead ends: 236 [2020-08-21 13:25:36,661 INFO L226 Difference]: Without dead ends: 188 [2020-08-21 13:25:36,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-21 13:25:36,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-08-21 13:25:36,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 63. [2020-08-21 13:25:36,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-21 13:25:36,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-08-21 13:25:36,674 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 20 [2020-08-21 13:25:36,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:25:36,674 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-08-21 13:25:36,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 13:25:36,675 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-08-21 13:25:36,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 13:25:36,676 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:25:36,676 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:25:36,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 13:25:36,676 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:25:36,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:25:36,677 INFO L82 PathProgramCache]: Analyzing trace with hash -739516458, now seen corresponding path program 4 times [2020-08-21 13:25:36,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:25:36,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454275331] [2020-08-21 13:25:36,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:25:36,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:36,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:25:36,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:36,735 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-21 13:25:36,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454275331] [2020-08-21 13:25:36,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:25:36,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 13:25:36,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319220058] [2020-08-21 13:25:36,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 13:25:36,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:25:36,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 13:25:36,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 13:25:36,737 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 5 states. [2020-08-21 13:25:36,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:25:36,843 INFO L93 Difference]: Finished difference Result 116 states and 144 transitions. [2020-08-21 13:25:36,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 13:25:36,843 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-08-21 13:25:36,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:25:36,844 INFO L225 Difference]: With dead ends: 116 [2020-08-21 13:25:36,844 INFO L226 Difference]: Without dead ends: 67 [2020-08-21 13:25:36,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 13:25:36,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-08-21 13:25:36,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2020-08-21 13:25:36,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-21 13:25:36,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2020-08-21 13:25:36,852 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 22 [2020-08-21 13:25:36,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:25:36,853 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2020-08-21 13:25:36,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 13:25:36,853 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2020-08-21 13:25:36,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-21 13:25:36,854 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:25:36,855 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1] [2020-08-21 13:25:36,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 13:25:36,855 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:25:36,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:25:36,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1301458888, now seen corresponding path program 1 times [2020-08-21 13:25:36,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:25:36,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645504302] [2020-08-21 13:25:36,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:25:36,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:36,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:25:36,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:36,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 13:25:36,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:36,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 13:25:36,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:36,957 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:25:36,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645504302] [2020-08-21 13:25:36,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:25:36,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 13:25:36,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815311599] [2020-08-21 13:25:36,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 13:25:36,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:25:36,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 13:25:36,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-21 13:25:36,960 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand 9 states. [2020-08-21 13:25:37,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:25:37,332 INFO L93 Difference]: Finished difference Result 223 states and 292 transitions. [2020-08-21 13:25:37,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 13:25:37,333 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-08-21 13:25:37,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:25:37,335 INFO L225 Difference]: With dead ends: 223 [2020-08-21 13:25:37,335 INFO L226 Difference]: Without dead ends: 173 [2020-08-21 13:25:37,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-08-21 13:25:37,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-08-21 13:25:37,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 67. [2020-08-21 13:25:37,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-21 13:25:37,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2020-08-21 13:25:37,354 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 41 [2020-08-21 13:25:37,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:25:37,355 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2020-08-21 13:25:37,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 13:25:37,355 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2020-08-21 13:25:37,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-21 13:25:37,356 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:25:37,356 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1] [2020-08-21 13:25:37,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 13:25:37,357 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:25:37,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:25:37,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1302417578, now seen corresponding path program 2 times [2020-08-21 13:25:37,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:25:37,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567493301] [2020-08-21 13:25:37,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:25:37,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:37,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:25:37,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:37,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 13:25:37,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:37,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-21 13:25:37,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:37,480 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:25:37,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567493301] [2020-08-21 13:25:37,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:25:37,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 13:25:37,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805906268] [2020-08-21 13:25:37,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 13:25:37,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:25:37,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 13:25:37,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-21 13:25:37,483 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand 10 states. [2020-08-21 13:25:37,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:25:37,917 INFO L93 Difference]: Finished difference Result 246 states and 324 transitions. [2020-08-21 13:25:37,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 13:25:37,917 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-21 13:25:37,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:25:37,919 INFO L225 Difference]: With dead ends: 246 [2020-08-21 13:25:37,919 INFO L226 Difference]: Without dead ends: 196 [2020-08-21 13:25:37,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-08-21 13:25:37,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-21 13:25:37,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 69. [2020-08-21 13:25:37,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-21 13:25:37,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2020-08-21 13:25:37,936 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 43 [2020-08-21 13:25:37,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:25:37,937 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2020-08-21 13:25:37,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 13:25:37,937 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2020-08-21 13:25:37,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-21 13:25:37,939 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:25:37,939 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1] [2020-08-21 13:25:37,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 13:25:37,939 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:25:37,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:25:37,940 INFO L82 PathProgramCache]: Analyzing trace with hash 2071248628, now seen corresponding path program 3 times [2020-08-21 13:25:37,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:25:37,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190880024] [2020-08-21 13:25:37,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:25:37,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:38,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:25:38,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:38,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-21 13:25:38,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:38,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 13:25:38,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:38,040 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:25:38,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190880024] [2020-08-21 13:25:38,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:25:38,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 13:25:38,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337343219] [2020-08-21 13:25:38,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 13:25:38,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:25:38,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 13:25:38,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-21 13:25:38,043 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand 11 states. [2020-08-21 13:25:38,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:25:38,530 INFO L93 Difference]: Finished difference Result 269 states and 356 transitions. [2020-08-21 13:25:38,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 13:25:38,531 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-08-21 13:25:38,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:25:38,533 INFO L225 Difference]: With dead ends: 269 [2020-08-21 13:25:38,533 INFO L226 Difference]: Without dead ends: 219 [2020-08-21 13:25:38,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-08-21 13:25:38,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-08-21 13:25:38,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 71. [2020-08-21 13:25:38,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-21 13:25:38,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2020-08-21 13:25:38,547 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 45 [2020-08-21 13:25:38,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:25:38,547 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2020-08-21 13:25:38,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 13:25:38,547 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2020-08-21 13:25:38,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-21 13:25:38,552 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:25:38,552 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 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, 1, 1] [2020-08-21 13:25:38,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 13:25:38,553 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:25:38,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:25:38,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1464164114, now seen corresponding path program 4 times [2020-08-21 13:25:38,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:25:38,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395180617] [2020-08-21 13:25:38,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:25:38,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:38,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:25:38,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:38,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 13:25:38,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:38,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 13:25:38,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:38,718 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:25:38,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395180617] [2020-08-21 13:25:38,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:25:38,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 13:25:38,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201507275] [2020-08-21 13:25:38,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 13:25:38,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:25:38,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 13:25:38,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-21 13:25:38,721 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand 12 states. [2020-08-21 13:25:39,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:25:39,290 INFO L93 Difference]: Finished difference Result 292 states and 388 transitions. [2020-08-21 13:25:39,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 13:25:39,291 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-08-21 13:25:39,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:25:39,294 INFO L225 Difference]: With dead ends: 292 [2020-08-21 13:25:39,294 INFO L226 Difference]: Without dead ends: 242 [2020-08-21 13:25:39,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-08-21 13:25:39,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-08-21 13:25:39,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 73. [2020-08-21 13:25:39,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-21 13:25:39,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2020-08-21 13:25:39,306 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 47 [2020-08-21 13:25:39,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:25:39,306 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2020-08-21 13:25:39,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 13:25:39,306 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2020-08-21 13:25:39,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-21 13:25:39,307 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:25:39,307 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 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, 1, 1] [2020-08-21 13:25:39,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 13:25:39,308 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:25:39,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:25:39,308 INFO L82 PathProgramCache]: Analyzing trace with hash -2123468880, now seen corresponding path program 5 times [2020-08-21 13:25:39,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:25:39,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576610525] [2020-08-21 13:25:39,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:25:39,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:39,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:25:39,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:39,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 13:25:39,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:39,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 13:25:39,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:39,435 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:25:39,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576610525] [2020-08-21 13:25:39,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:25:39,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 13:25:39,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547297854] [2020-08-21 13:25:39,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 13:25:39,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:25:39,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 13:25:39,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-21 13:25:39,438 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 13 states. [2020-08-21 13:25:40,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:25:40,015 INFO L93 Difference]: Finished difference Result 315 states and 420 transitions. [2020-08-21 13:25:40,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 13:25:40,016 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-08-21 13:25:40,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:25:40,019 INFO L225 Difference]: With dead ends: 315 [2020-08-21 13:25:40,019 INFO L226 Difference]: Without dead ends: 265 [2020-08-21 13:25:40,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2020-08-21 13:25:40,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-08-21 13:25:40,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 75. [2020-08-21 13:25:40,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-21 13:25:40,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2020-08-21 13:25:40,045 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 49 [2020-08-21 13:25:40,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:25:40,047 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2020-08-21 13:25:40,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 13:25:40,047 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2020-08-21 13:25:40,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 13:25:40,048 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:25:40,049 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 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, 1, 1] [2020-08-21 13:25:40,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 13:25:40,049 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:25:40,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:25:40,049 INFO L82 PathProgramCache]: Analyzing trace with hash -980037426, now seen corresponding path program 6 times [2020-08-21 13:25:40,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:25:40,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79315956] [2020-08-21 13:25:40,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:25:40,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:40,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:25:40,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:40,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-21 13:25:40,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:40,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 13:25:40,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:40,271 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:25:40,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79315956] [2020-08-21 13:25:40,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:25:40,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 13:25:40,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045138862] [2020-08-21 13:25:40,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 13:25:40,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:25:40,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 13:25:40,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-21 13:25:40,275 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand 14 states. [2020-08-21 13:25:40,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:25:40,868 INFO L93 Difference]: Finished difference Result 338 states and 452 transitions. [2020-08-21 13:25:40,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 13:25:40,868 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-08-21 13:25:40,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:25:40,871 INFO L225 Difference]: With dead ends: 338 [2020-08-21 13:25:40,871 INFO L226 Difference]: Without dead ends: 288 [2020-08-21 13:25:40,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2020-08-21 13:25:40,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-08-21 13:25:40,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 77. [2020-08-21 13:25:40,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-21 13:25:40,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2020-08-21 13:25:40,880 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 51 [2020-08-21 13:25:40,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:25:40,880 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2020-08-21 13:25:40,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 13:25:40,881 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2020-08-21 13:25:40,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-21 13:25:40,881 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:25:40,882 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 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, 1, 1] [2020-08-21 13:25:40,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 13:25:40,882 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:25:40,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:25:40,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1654037908, now seen corresponding path program 7 times [2020-08-21 13:25:40,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:25:40,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817409508] [2020-08-21 13:25:40,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:25:40,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:41,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:25:41,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:41,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 13:25:41,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:41,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 13:25:41,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:41,037 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:25:41,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817409508] [2020-08-21 13:25:41,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:25:41,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 13:25:41,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924328316] [2020-08-21 13:25:41,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 13:25:41,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:25:41,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 13:25:41,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-21 13:25:41,040 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand 15 states. [2020-08-21 13:25:41,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:25:41,777 INFO L93 Difference]: Finished difference Result 361 states and 484 transitions. [2020-08-21 13:25:41,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 13:25:41,778 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-08-21 13:25:41,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:25:41,780 INFO L225 Difference]: With dead ends: 361 [2020-08-21 13:25:41,782 INFO L226 Difference]: Without dead ends: 311 [2020-08-21 13:25:41,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2020-08-21 13:25:41,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-08-21 13:25:41,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 79. [2020-08-21 13:25:41,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-21 13:25:41,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2020-08-21 13:25:41,804 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 53 [2020-08-21 13:25:41,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:25:41,805 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2020-08-21 13:25:41,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 13:25:41,805 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2020-08-21 13:25:41,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 13:25:41,807 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:25:41,807 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 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, 1, 1] [2020-08-21 13:25:41,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 13:25:41,808 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:25:41,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:25:41,810 INFO L82 PathProgramCache]: Analyzing trace with hash -828439414, now seen corresponding path program 8 times [2020-08-21 13:25:41,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:25:41,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544071733] [2020-08-21 13:25:41,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:25:41,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:41,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:25:41,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:41,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 13:25:42,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:42,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 13:25:42,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:42,018 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:25:42,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544071733] [2020-08-21 13:25:42,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:25:42,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 13:25:42,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545594061] [2020-08-21 13:25:42,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 13:25:42,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:25:42,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 13:25:42,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-21 13:25:42,021 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand 16 states. [2020-08-21 13:25:42,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:25:42,792 INFO L93 Difference]: Finished difference Result 384 states and 516 transitions. [2020-08-21 13:25:42,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 13:25:42,793 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 55 [2020-08-21 13:25:42,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:25:42,797 INFO L225 Difference]: With dead ends: 384 [2020-08-21 13:25:42,797 INFO L226 Difference]: Without dead ends: 334 [2020-08-21 13:25:42,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2020-08-21 13:25:42,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-08-21 13:25:42,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 81. [2020-08-21 13:25:42,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-21 13:25:42,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2020-08-21 13:25:42,817 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 55 [2020-08-21 13:25:42,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:25:42,818 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2020-08-21 13:25:42,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 13:25:42,818 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2020-08-21 13:25:42,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 13:25:42,824 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:25:42,825 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 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, 1, 1] [2020-08-21 13:25:42,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 13:25:42,825 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:25:42,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:25:42,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1997236440, now seen corresponding path program 9 times [2020-08-21 13:25:42,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:25:42,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173269295] [2020-08-21 13:25:42,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:25:42,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:43,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:25:43,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:43,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 13:25:43,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:43,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 13:25:43,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:43,130 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:25:43,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173269295] [2020-08-21 13:25:43,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:25:43,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 13:25:43,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584031854] [2020-08-21 13:25:43,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 13:25:43,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:25:43,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 13:25:43,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-21 13:25:43,135 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand 17 states. [2020-08-21 13:25:43,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:25:43,912 INFO L93 Difference]: Finished difference Result 407 states and 548 transitions. [2020-08-21 13:25:43,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 13:25:43,912 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 57 [2020-08-21 13:25:43,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:25:43,915 INFO L225 Difference]: With dead ends: 407 [2020-08-21 13:25:43,915 INFO L226 Difference]: Without dead ends: 357 [2020-08-21 13:25:43,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2020-08-21 13:25:43,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-08-21 13:25:43,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 83. [2020-08-21 13:25:43,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-21 13:25:43,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2020-08-21 13:25:43,927 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 57 [2020-08-21 13:25:43,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:25:43,928 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2020-08-21 13:25:43,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-21 13:25:43,928 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2020-08-21 13:25:43,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-21 13:25:43,929 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:25:43,929 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 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, 1, 1] [2020-08-21 13:25:43,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 13:25:43,930 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:25:43,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:25:43,930 INFO L82 PathProgramCache]: Analyzing trace with hash 70253126, now seen corresponding path program 10 times [2020-08-21 13:25:43,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:25:43,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014279538] [2020-08-21 13:25:43,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:25:43,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:44,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:25:44,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:44,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 13:25:44,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:44,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 13:25:44,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:44,125 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:25:44,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014279538] [2020-08-21 13:25:44,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:25:44,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-21 13:25:44,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725698049] [2020-08-21 13:25:44,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-21 13:25:44,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:25:44,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-21 13:25:44,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-21 13:25:44,127 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand 18 states. [2020-08-21 13:25:44,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:25:44,918 INFO L93 Difference]: Finished difference Result 430 states and 580 transitions. [2020-08-21 13:25:44,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 13:25:44,919 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 59 [2020-08-21 13:25:44,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:25:44,922 INFO L225 Difference]: With dead ends: 430 [2020-08-21 13:25:44,923 INFO L226 Difference]: Without dead ends: 380 [2020-08-21 13:25:44,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2020-08-21 13:25:44,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-08-21 13:25:44,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 85. [2020-08-21 13:25:44,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-21 13:25:44,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2020-08-21 13:25:44,941 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 59 [2020-08-21 13:25:44,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:25:44,942 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2020-08-21 13:25:44,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-21 13:25:44,942 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2020-08-21 13:25:44,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 13:25:44,943 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:25:44,943 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 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, 1, 1] [2020-08-21 13:25:44,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 13:25:44,944 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:25:44,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:25:44,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1642131996, now seen corresponding path program 11 times [2020-08-21 13:25:44,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:25:44,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312967227] [2020-08-21 13:25:44,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:25:44,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:45,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:25:45,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:45,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 13:25:45,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:45,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 13:25:45,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:45,219 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:25:45,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312967227] [2020-08-21 13:25:45,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:25:45,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-21 13:25:45,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531483634] [2020-08-21 13:25:45,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-21 13:25:45,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:25:45,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-21 13:25:45,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-21 13:25:45,222 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand 19 states. [2020-08-21 13:25:46,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:25:46,078 INFO L93 Difference]: Finished difference Result 453 states and 612 transitions. [2020-08-21 13:25:46,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 13:25:46,079 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 61 [2020-08-21 13:25:46,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:25:46,082 INFO L225 Difference]: With dead ends: 453 [2020-08-21 13:25:46,082 INFO L226 Difference]: Without dead ends: 403 [2020-08-21 13:25:46,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2020-08-21 13:25:46,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-08-21 13:25:46,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 87. [2020-08-21 13:25:46,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-21 13:25:46,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2020-08-21 13:25:46,106 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 61 [2020-08-21 13:25:46,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:25:46,107 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2020-08-21 13:25:46,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-21 13:25:46,107 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2020-08-21 13:25:46,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-21 13:25:46,108 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:25:46,108 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 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, 1, 1] [2020-08-21 13:25:46,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 13:25:46,108 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:25:46,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:25:46,109 INFO L82 PathProgramCache]: Analyzing trace with hash 2023207426, now seen corresponding path program 12 times [2020-08-21 13:25:46,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:25:46,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991575956] [2020-08-21 13:25:46,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:25:46,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:46,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:25:46,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:46,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 13:25:46,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:46,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-21 13:25:46,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:46,373 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:25:46,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991575956] [2020-08-21 13:25:46,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:25:46,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-21 13:25:46,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194539748] [2020-08-21 13:25:46,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-21 13:25:46,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:25:46,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-21 13:25:46,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-08-21 13:25:46,375 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand 20 states. [2020-08-21 13:25:47,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:25:47,262 INFO L93 Difference]: Finished difference Result 476 states and 644 transitions. [2020-08-21 13:25:47,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 13:25:47,263 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 63 [2020-08-21 13:25:47,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:25:47,266 INFO L225 Difference]: With dead ends: 476 [2020-08-21 13:25:47,266 INFO L226 Difference]: Without dead ends: 426 [2020-08-21 13:25:47,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=282, Unknown=0, NotChecked=0, Total=462 [2020-08-21 13:25:47,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-08-21 13:25:47,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 89. [2020-08-21 13:25:47,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-21 13:25:47,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2020-08-21 13:25:47,280 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 63 [2020-08-21 13:25:47,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:25:47,280 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2020-08-21 13:25:47,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-21 13:25:47,280 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2020-08-21 13:25:47,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-21 13:25:47,281 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:25:47,281 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 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, 1, 1] [2020-08-21 13:25:47,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 13:25:47,282 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:25:47,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:25:47,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1753758048, now seen corresponding path program 13 times [2020-08-21 13:25:47,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:25:47,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433262058] [2020-08-21 13:25:47,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:25:47,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:47,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:25:47,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:47,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 13:25:47,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:47,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-21 13:25:47,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:47,563 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:25:47,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433262058] [2020-08-21 13:25:47,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:25:47,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-21 13:25:47,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486105591] [2020-08-21 13:25:47,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-21 13:25:47,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:25:47,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-21 13:25:47,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-08-21 13:25:47,571 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand 21 states. [2020-08-21 13:25:48,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:25:48,713 INFO L93 Difference]: Finished difference Result 499 states and 676 transitions. [2020-08-21 13:25:48,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-21 13:25:48,714 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 65 [2020-08-21 13:25:48,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:25:48,716 INFO L225 Difference]: With dead ends: 499 [2020-08-21 13:25:48,716 INFO L226 Difference]: Without dead ends: 449 [2020-08-21 13:25:48,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=199, Invalid=307, Unknown=0, NotChecked=0, Total=506 [2020-08-21 13:25:48,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2020-08-21 13:25:48,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 91. [2020-08-21 13:25:48,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-21 13:25:48,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2020-08-21 13:25:48,728 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 65 [2020-08-21 13:25:48,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:25:48,728 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2020-08-21 13:25:48,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-21 13:25:48,728 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2020-08-21 13:25:48,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-21 13:25:48,729 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:25:48,729 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 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, 1, 1] [2020-08-21 13:25:48,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 13:25:48,730 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:25:48,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:25:48,730 INFO L82 PathProgramCache]: Analyzing trace with hash 2124753854, now seen corresponding path program 14 times [2020-08-21 13:25:48,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:25:48,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203523026] [2020-08-21 13:25:48,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:25:48,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:48,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:25:48,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:48,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 13:25:48,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:49,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-21 13:25:49,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:49,013 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:25:49,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203523026] [2020-08-21 13:25:49,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:25:49,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 13:25:49,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140895758] [2020-08-21 13:25:49,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 13:25:49,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:25:49,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 13:25:49,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-08-21 13:25:49,019 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand 22 states. [2020-08-21 13:25:50,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:25:50,224 INFO L93 Difference]: Finished difference Result 522 states and 708 transitions. [2020-08-21 13:25:50,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 13:25:50,225 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2020-08-21 13:25:50,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:25:50,228 INFO L225 Difference]: With dead ends: 522 [2020-08-21 13:25:50,228 INFO L226 Difference]: Without dead ends: 472 [2020-08-21 13:25:50,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=333, Unknown=0, NotChecked=0, Total=552 [2020-08-21 13:25:50,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-08-21 13:25:50,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 93. [2020-08-21 13:25:50,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-21 13:25:50,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2020-08-21 13:25:50,240 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 67 [2020-08-21 13:25:50,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:25:50,240 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2020-08-21 13:25:50,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 13:25:50,240 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2020-08-21 13:25:50,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-21 13:25:50,241 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:25:50,241 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 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, 1, 1] [2020-08-21 13:25:50,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 13:25:50,242 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:25:50,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:25:50,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1343078748, now seen corresponding path program 15 times [2020-08-21 13:25:50,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:25:50,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467546969] [2020-08-21 13:25:50,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:25:50,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:50,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:25:50,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:50,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 13:25:50,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:50,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-21 13:25:50,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:50,564 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:25:50,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467546969] [2020-08-21 13:25:50,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:25:50,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-21 13:25:50,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479098391] [2020-08-21 13:25:50,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-21 13:25:50,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:25:50,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-21 13:25:50,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-08-21 13:25:50,566 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand 23 states. [2020-08-21 13:25:51,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:25:51,831 INFO L93 Difference]: Finished difference Result 545 states and 740 transitions. [2020-08-21 13:25:51,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 13:25:51,831 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 69 [2020-08-21 13:25:51,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:25:51,834 INFO L225 Difference]: With dead ends: 545 [2020-08-21 13:25:51,834 INFO L226 Difference]: Without dead ends: 495 [2020-08-21 13:25:51,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=360, Unknown=0, NotChecked=0, Total=600 [2020-08-21 13:25:51,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2020-08-21 13:25:51,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 95. [2020-08-21 13:25:51,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-21 13:25:51,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2020-08-21 13:25:51,845 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 69 [2020-08-21 13:25:51,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:25:51,845 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2020-08-21 13:25:51,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-21 13:25:51,845 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2020-08-21 13:25:51,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-21 13:25:51,846 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:25:51,846 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 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, 1, 1] [2020-08-21 13:25:51,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 13:25:51,847 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:25:51,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:25:51,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1772578682, now seen corresponding path program 16 times [2020-08-21 13:25:51,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:25:51,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57168957] [2020-08-21 13:25:51,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:25:51,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:52,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:25:52,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:52,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-21 13:25:52,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:52,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-21 13:25:52,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:52,213 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:25:52,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57168957] [2020-08-21 13:25:52,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:25:52,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-21 13:25:52,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758490286] [2020-08-21 13:25:52,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-21 13:25:52,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:25:52,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-21 13:25:52,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-08-21 13:25:52,216 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand 24 states. [2020-08-21 13:25:53,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:25:53,669 INFO L93 Difference]: Finished difference Result 568 states and 772 transitions. [2020-08-21 13:25:53,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-21 13:25:53,670 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 71 [2020-08-21 13:25:53,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:25:53,673 INFO L225 Difference]: With dead ends: 568 [2020-08-21 13:25:53,673 INFO L226 Difference]: Without dead ends: 518 [2020-08-21 13:25:53,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=262, Invalid=388, Unknown=0, NotChecked=0, Total=650 [2020-08-21 13:25:53,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2020-08-21 13:25:53,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 97. [2020-08-21 13:25:53,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-08-21 13:25:53,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2020-08-21 13:25:53,685 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 71 [2020-08-21 13:25:53,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:25:53,685 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2020-08-21 13:25:53,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-21 13:25:53,685 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2020-08-21 13:25:53,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-21 13:25:53,686 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:25:53,686 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 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, 1, 1] [2020-08-21 13:25:53,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 13:25:53,687 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:25:53,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:25:53,687 INFO L82 PathProgramCache]: Analyzing trace with hash -2089812456, now seen corresponding path program 17 times [2020-08-21 13:25:53,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:25:53,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211594641] [2020-08-21 13:25:53,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:25:53,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:54,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:25:54,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:54,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-21 13:25:54,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:54,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 13:25:54,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:54,145 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:25:54,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211594641] [2020-08-21 13:25:54,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:25:54,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-21 13:25:54,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713335671] [2020-08-21 13:25:54,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-21 13:25:54,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:25:54,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-21 13:25:54,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-08-21 13:25:54,151 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand 25 states. [2020-08-21 13:25:55,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:25:55,401 INFO L93 Difference]: Finished difference Result 591 states and 804 transitions. [2020-08-21 13:25:55,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-21 13:25:55,403 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2020-08-21 13:25:55,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:25:55,406 INFO L225 Difference]: With dead ends: 591 [2020-08-21 13:25:55,407 INFO L226 Difference]: Without dead ends: 541 [2020-08-21 13:25:55,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2020-08-21 13:25:55,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2020-08-21 13:25:55,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 99. [2020-08-21 13:25:55,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-21 13:25:55,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2020-08-21 13:25:55,418 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 73 [2020-08-21 13:25:55,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:25:55,418 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2020-08-21 13:25:55,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-21 13:25:55,419 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2020-08-21 13:25:55,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-21 13:25:55,419 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:25:55,420 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 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, 1, 1] [2020-08-21 13:25:55,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 13:25:55,420 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:25:55,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:25:55,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1299014966, now seen corresponding path program 18 times [2020-08-21 13:25:55,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:25:55,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246115366] [2020-08-21 13:25:55,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:25:55,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:55,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:25:55,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:55,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-21 13:25:55,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:55,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-21 13:25:55,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:55,822 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:25:55,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246115366] [2020-08-21 13:25:55,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:25:55,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-21 13:25:55,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529442314] [2020-08-21 13:25:55,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-21 13:25:55,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:25:55,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-21 13:25:55,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-08-21 13:25:55,825 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand 26 states. [2020-08-21 13:25:57,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:25:57,182 INFO L93 Difference]: Finished difference Result 614 states and 836 transitions. [2020-08-21 13:25:57,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-21 13:25:57,183 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 75 [2020-08-21 13:25:57,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:25:57,186 INFO L225 Difference]: With dead ends: 614 [2020-08-21 13:25:57,186 INFO L226 Difference]: Without dead ends: 564 [2020-08-21 13:25:57,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=309, Invalid=447, Unknown=0, NotChecked=0, Total=756 [2020-08-21 13:25:57,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-08-21 13:25:57,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 101. [2020-08-21 13:25:57,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-21 13:25:57,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2020-08-21 13:25:57,203 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 75 [2020-08-21 13:25:57,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:25:57,203 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2020-08-21 13:25:57,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-21 13:25:57,203 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2020-08-21 13:25:57,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-21 13:25:57,204 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:25:57,204 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 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, 1, 1] [2020-08-21 13:25:57,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 13:25:57,205 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:25:57,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:25:57,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1918010156, now seen corresponding path program 19 times [2020-08-21 13:25:57,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:25:57,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030190187] [2020-08-21 13:25:57,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:25:57,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:57,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:25:57,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:57,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-21 13:25:57,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:57,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-21 13:25:57,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:25:57,606 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:25:57,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030190187] [2020-08-21 13:25:57,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:25:57,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-21 13:25:57,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031520218] [2020-08-21 13:25:57,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-21 13:25:57,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:25:57,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-21 13:25:57,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-08-21 13:25:57,608 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand 27 states. [2020-08-21 13:25:59,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:25:59,464 INFO L93 Difference]: Finished difference Result 637 states and 868 transitions. [2020-08-21 13:25:59,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-21 13:25:59,465 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 77 [2020-08-21 13:25:59,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:25:59,470 INFO L225 Difference]: With dead ends: 637 [2020-08-21 13:25:59,470 INFO L226 Difference]: Without dead ends: 587 [2020-08-21 13:25:59,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=334, Invalid=478, Unknown=0, NotChecked=0, Total=812 [2020-08-21 13:25:59,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-08-21 13:25:59,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 103. [2020-08-21 13:25:59,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-08-21 13:25:59,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2020-08-21 13:25:59,495 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 77 [2020-08-21 13:25:59,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:25:59,495 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2020-08-21 13:25:59,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-21 13:25:59,495 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2020-08-21 13:25:59,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-21 13:25:59,496 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:25:59,496 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 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, 1, 1] [2020-08-21 13:25:59,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 13:25:59,497 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:25:59,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:25:59,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1102699278, now seen corresponding path program 20 times [2020-08-21 13:25:59,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:25:59,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971910978] [2020-08-21 13:25:59,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:25:59,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:00,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:26:00,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:00,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-21 13:26:00,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:00,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-21 13:26:00,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:00,123 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:26:00,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971910978] [2020-08-21 13:26:00,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:26:00,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-21 13:26:00,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511634149] [2020-08-21 13:26:00,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-21 13:26:00,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:26:00,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-21 13:26:00,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-08-21 13:26:00,126 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand 28 states. [2020-08-21 13:26:02,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:26:02,535 INFO L93 Difference]: Finished difference Result 660 states and 900 transitions. [2020-08-21 13:26:02,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-21 13:26:02,536 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2020-08-21 13:26:02,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:26:02,540 INFO L225 Difference]: With dead ends: 660 [2020-08-21 13:26:02,541 INFO L226 Difference]: Without dead ends: 610 [2020-08-21 13:26:02,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=360, Invalid=510, Unknown=0, NotChecked=0, Total=870 [2020-08-21 13:26:02,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2020-08-21 13:26:02,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 105. [2020-08-21 13:26:02,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-21 13:26:02,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2020-08-21 13:26:02,557 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 79 [2020-08-21 13:26:02,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:26:02,558 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2020-08-21 13:26:02,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-21 13:26:02,558 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2020-08-21 13:26:02,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-21 13:26:02,559 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:26:02,560 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 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, 1, 1] [2020-08-21 13:26:02,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-21 13:26:02,560 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:26:02,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:26:02,561 INFO L82 PathProgramCache]: Analyzing trace with hash 727006608, now seen corresponding path program 21 times [2020-08-21 13:26:02,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:26:02,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240687194] [2020-08-21 13:26:02,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:26:02,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:03,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:26:03,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:03,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 13:26:03,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:03,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-21 13:26:03,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:03,145 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:26:03,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240687194] [2020-08-21 13:26:03,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:26:03,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-21 13:26:03,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645229120] [2020-08-21 13:26:03,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-21 13:26:03,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:26:03,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-21 13:26:03,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-08-21 13:26:03,148 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand 29 states. [2020-08-21 13:26:04,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:26:04,812 INFO L93 Difference]: Finished difference Result 683 states and 932 transitions. [2020-08-21 13:26:04,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-21 13:26:04,815 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 81 [2020-08-21 13:26:04,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:26:04,819 INFO L225 Difference]: With dead ends: 683 [2020-08-21 13:26:04,819 INFO L226 Difference]: Without dead ends: 633 [2020-08-21 13:26:04,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=387, Invalid=543, Unknown=0, NotChecked=0, Total=930 [2020-08-21 13:26:04,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2020-08-21 13:26:04,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 107. [2020-08-21 13:26:04,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-21 13:26:04,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2020-08-21 13:26:04,834 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 81 [2020-08-21 13:26:04,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:26:04,835 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2020-08-21 13:26:04,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-21 13:26:04,835 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2020-08-21 13:26:04,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-21 13:26:04,836 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:26:04,836 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 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, 1, 1] [2020-08-21 13:26:04,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-21 13:26:04,836 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:26:04,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:26:04,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1862228306, now seen corresponding path program 22 times [2020-08-21 13:26:04,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:26:04,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846390041] [2020-08-21 13:26:04,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:26:04,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:05,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:26:05,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:05,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-21 13:26:05,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:05,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-21 13:26:05,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:05,332 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:26:05,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846390041] [2020-08-21 13:26:05,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:26:05,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-21 13:26:05,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909061242] [2020-08-21 13:26:05,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-21 13:26:05,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:26:05,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-21 13:26:05,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2020-08-21 13:26:05,335 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 30 states. [2020-08-21 13:26:07,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:26:07,274 INFO L93 Difference]: Finished difference Result 706 states and 964 transitions. [2020-08-21 13:26:07,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-21 13:26:07,275 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 83 [2020-08-21 13:26:07,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:26:07,278 INFO L225 Difference]: With dead ends: 706 [2020-08-21 13:26:07,278 INFO L226 Difference]: Without dead ends: 656 [2020-08-21 13:26:07,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=415, Invalid=577, Unknown=0, NotChecked=0, Total=992 [2020-08-21 13:26:07,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2020-08-21 13:26:07,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 109. [2020-08-21 13:26:07,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-08-21 13:26:07,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 121 transitions. [2020-08-21 13:26:07,289 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 121 transitions. Word has length 83 [2020-08-21 13:26:07,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:26:07,289 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 121 transitions. [2020-08-21 13:26:07,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-21 13:26:07,289 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 121 transitions. [2020-08-21 13:26:07,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-21 13:26:07,290 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:26:07,291 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 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, 1, 1] [2020-08-21 13:26:07,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-21 13:26:07,291 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:26:07,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:26:07,291 INFO L82 PathProgramCache]: Analyzing trace with hash 964051020, now seen corresponding path program 23 times [2020-08-21 13:26:07,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:26:07,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2143171904] [2020-08-21 13:26:07,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:26:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:07,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:26:07,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:07,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-21 13:26:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:07,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-21 13:26:07,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:07,824 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:26:07,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2143171904] [2020-08-21 13:26:07,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:26:07,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-21 13:26:07,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894104176] [2020-08-21 13:26:07,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-21 13:26:07,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:26:07,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-21 13:26:07,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2020-08-21 13:26:07,827 INFO L87 Difference]: Start difference. First operand 109 states and 121 transitions. Second operand 31 states. [2020-08-21 13:26:09,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:26:09,958 INFO L93 Difference]: Finished difference Result 729 states and 996 transitions. [2020-08-21 13:26:09,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-21 13:26:09,959 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 85 [2020-08-21 13:26:09,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:26:09,962 INFO L225 Difference]: With dead ends: 729 [2020-08-21 13:26:09,962 INFO L226 Difference]: Without dead ends: 679 [2020-08-21 13:26:09,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=444, Invalid=612, Unknown=0, NotChecked=0, Total=1056 [2020-08-21 13:26:09,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2020-08-21 13:26:09,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 111. [2020-08-21 13:26:09,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-08-21 13:26:09,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2020-08-21 13:26:09,973 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 85 [2020-08-21 13:26:09,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:26:09,974 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2020-08-21 13:26:09,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-21 13:26:09,974 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2020-08-21 13:26:09,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-21 13:26:09,975 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:26:09,975 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 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, 1, 1] [2020-08-21 13:26:09,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-21 13:26:09,975 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:26:09,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:26:09,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1695815062, now seen corresponding path program 24 times [2020-08-21 13:26:09,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:26:09,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931949530] [2020-08-21 13:26:09,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:26:09,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:10,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:26:10,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:10,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-21 13:26:10,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:10,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 13:26:10,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:10,522 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:26:10,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931949530] [2020-08-21 13:26:10,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:26:10,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-21 13:26:10,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56721770] [2020-08-21 13:26:10,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-21 13:26:10,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:26:10,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-21 13:26:10,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2020-08-21 13:26:10,525 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand 32 states. [2020-08-21 13:26:12,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:26:12,336 INFO L93 Difference]: Finished difference Result 752 states and 1028 transitions. [2020-08-21 13:26:12,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-21 13:26:12,336 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 87 [2020-08-21 13:26:12,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:26:12,340 INFO L225 Difference]: With dead ends: 752 [2020-08-21 13:26:12,341 INFO L226 Difference]: Without dead ends: 702 [2020-08-21 13:26:12,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=474, Invalid=648, Unknown=0, NotChecked=0, Total=1122 [2020-08-21 13:26:12,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2020-08-21 13:26:12,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 113. [2020-08-21 13:26:12,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-21 13:26:12,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2020-08-21 13:26:12,355 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 87 [2020-08-21 13:26:12,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:26:12,356 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2020-08-21 13:26:12,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-21 13:26:12,356 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2020-08-21 13:26:12,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-21 13:26:12,357 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:26:12,357 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 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, 1, 1] [2020-08-21 13:26:12,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-21 13:26:12,357 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:26:12,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:26:12,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1973388552, now seen corresponding path program 25 times [2020-08-21 13:26:12,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:26:12,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716852013] [2020-08-21 13:26:12,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:26:12,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:12,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:26:12,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:12,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-21 13:26:12,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:12,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-21 13:26:12,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:12,429 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-08-21 13:26:12,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716852013] [2020-08-21 13:26:12,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:26:12,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 13:26:12,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536287597] [2020-08-21 13:26:12,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 13:26:12,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:26:12,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 13:26:12,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 13:26:12,433 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand 5 states. [2020-08-21 13:26:12,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:26:12,600 INFO L93 Difference]: Finished difference Result 177 states and 206 transitions. [2020-08-21 13:26:12,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 13:26:12,600 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2020-08-21 13:26:12,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:26:12,602 INFO L225 Difference]: With dead ends: 177 [2020-08-21 13:26:12,602 INFO L226 Difference]: Without dead ends: 132 [2020-08-21 13:26:12,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 13:26:12,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-21 13:26:12,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 114. [2020-08-21 13:26:12,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-21 13:26:12,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2020-08-21 13:26:12,608 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 89 [2020-08-21 13:26:12,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:26:12,609 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2020-08-21 13:26:12,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 13:26:12,609 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2020-08-21 13:26:12,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-21 13:26:12,609 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:26:12,610 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 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, 1, 1, 1, 1] [2020-08-21 13:26:12,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-21 13:26:12,610 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:26:12,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:26:12,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1905794714, now seen corresponding path program 1 times [2020-08-21 13:26:12,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:26:12,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384460284] [2020-08-21 13:26:12,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:26:12,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:12,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:26:12,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:12,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-21 13:26:12,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:12,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-21 13:26:12,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:12,677 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-08-21 13:26:12,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384460284] [2020-08-21 13:26:12,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:26:12,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 13:26:12,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289034468] [2020-08-21 13:26:12,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 13:26:12,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:26:12,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 13:26:12,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 13:26:12,679 INFO L87 Difference]: Start difference. First operand 114 states and 126 transitions. Second operand 6 states. [2020-08-21 13:26:12,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:26:12,859 INFO L93 Difference]: Finished difference Result 200 states and 238 transitions. [2020-08-21 13:26:12,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 13:26:12,860 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 91 [2020-08-21 13:26:12,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:26:12,862 INFO L225 Difference]: With dead ends: 200 [2020-08-21 13:26:12,862 INFO L226 Difference]: Without dead ends: 155 [2020-08-21 13:26:12,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 13:26:12,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-21 13:26:12,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 131. [2020-08-21 13:26:12,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-08-21 13:26:12,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 149 transitions. [2020-08-21 13:26:12,868 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 149 transitions. Word has length 91 [2020-08-21 13:26:12,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:26:12,868 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 149 transitions. [2020-08-21 13:26:12,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 13:26:12,868 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 149 transitions. [2020-08-21 13:26:12,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-21 13:26:12,869 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:26:12,869 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 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, 1, 1] [2020-08-21 13:26:12,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-21 13:26:12,871 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:26:12,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:26:12,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1769300412, now seen corresponding path program 2 times [2020-08-21 13:26:12,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:26:12,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318977013] [2020-08-21 13:26:12,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:26:12,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:12,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:26:12,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:12,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-21 13:26:12,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:12,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-21 13:26:12,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:13,004 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2020-08-21 13:26:13,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318977013] [2020-08-21 13:26:13,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:26:13,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 13:26:13,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673313496] [2020-08-21 13:26:13,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 13:26:13,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:26:13,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 13:26:13,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 13:26:13,006 INFO L87 Difference]: Start difference. First operand 131 states and 149 transitions. Second operand 6 states. [2020-08-21 13:26:13,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:26:13,161 INFO L93 Difference]: Finished difference Result 187 states and 222 transitions. [2020-08-21 13:26:13,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 13:26:13,161 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 93 [2020-08-21 13:26:13,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:26:13,162 INFO L225 Difference]: With dead ends: 187 [2020-08-21 13:26:13,162 INFO L226 Difference]: Without dead ends: 139 [2020-08-21 13:26:13,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-21 13:26:13,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-08-21 13:26:13,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2020-08-21 13:26:13,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-21 13:26:13,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 157 transitions. [2020-08-21 13:26:13,171 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 157 transitions. Word has length 93 [2020-08-21 13:26:13,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:26:13,171 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 157 transitions. [2020-08-21 13:26:13,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 13:26:13,172 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 157 transitions. [2020-08-21 13:26:13,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-21 13:26:13,173 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:26:13,173 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 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, 1, 1] [2020-08-21 13:26:13,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-21 13:26:13,173 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:26:13,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:26:13,174 INFO L82 PathProgramCache]: Analyzing trace with hash -351711109, now seen corresponding path program 1 times [2020-08-21 13:26:13,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:26:13,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636748504] [2020-08-21 13:26:13,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:26:13,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:13,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:26:13,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:13,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-21 13:26:13,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:13,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-21 13:26:13,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:26:13,284 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2020-08-21 13:26:13,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636748504] [2020-08-21 13:26:13,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:26:13,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 13:26:13,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276839631] [2020-08-21 13:26:13,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 13:26:13,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:26:13,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 13:26:13,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 13:26:13,286 INFO L87 Difference]: Start difference. First operand 137 states and 157 transitions. Second operand 7 states. [2020-08-21 13:26:13,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:26:13,413 INFO L93 Difference]: Finished difference Result 157 states and 181 transitions. [2020-08-21 13:26:13,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 13:26:13,414 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-08-21 13:26:13,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:26:13,415 INFO L225 Difference]: With dead ends: 157 [2020-08-21 13:26:13,415 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 13:26:13,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-08-21 13:26:13,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 13:26:13,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 13:26:13,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 13:26:13,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 13:26:13,416 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 93 [2020-08-21 13:26:13,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:26:13,417 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 13:26:13,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 13:26:13,417 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 13:26:13,417 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 13:26:13,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-21 13:26:13,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 13:26:13,704 INFO L271 CegarLoopResult]: At program point elem_existsENTRY(lines 9 15) the Hoare annotation is: true [2020-08-21 13:26:13,704 INFO L268 CegarLoopResult]: For program point elem_existsEXIT(lines 9 15) no Hoare annotation was computed. [2020-08-21 13:26:13,704 INFO L268 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-08-21 13:26:13,704 INFO L268 CegarLoopResult]: For program point L11-2(lines 11 13) no Hoare annotation was computed. [2020-08-21 13:26:13,704 INFO L268 CegarLoopResult]: For program point elem_existsFINAL(lines 9 15) no Hoare annotation was computed. [2020-08-21 13:26:13,704 INFO L264 CegarLoopResult]: At program point L11-3(lines 11 13) the Hoare annotation is: (and (<= 0 elem_exists_~i~0) (= elem_exists_~size |elem_exists_#in~size|)) [2020-08-21 13:26:13,704 INFO L268 CegarLoopResult]: For program point L11-4(lines 11 13) no Hoare annotation was computed. [2020-08-21 13:26:13,705 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-21 13:26:13,705 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |old(#NULL.base)| |#NULL.base|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-08-21 13:26:13,705 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 13:26:13,705 INFO L271 CegarLoopResult]: At program point insertENTRY(lines 5 8) the Hoare annotation is: true [2020-08-21 13:26:13,705 INFO L268 CegarLoopResult]: For program point insertFINAL(lines 5 8) no Hoare annotation was computed. [2020-08-21 13:26:13,705 INFO L268 CegarLoopResult]: For program point insertEXIT(lines 5 8) no Hoare annotation was computed. [2020-08-21 13:26:13,705 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 13:26:13,705 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 13:26:13,705 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 13:26:13,706 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 13:26:13,706 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 16 56) no Hoare annotation was computed. [2020-08-21 13:26:13,706 INFO L264 CegarLoopResult]: At program point L52(line 52) the Hoare annotation is: false [2020-08-21 13:26:13,706 INFO L268 CegarLoopResult]: For program point L52-1(line 52) no Hoare annotation was computed. [2020-08-21 13:26:13,706 INFO L268 CegarLoopResult]: For program point L44-2(lines 44 48) no Hoare annotation was computed. [2020-08-21 13:26:13,706 INFO L264 CegarLoopResult]: At program point L44-3(lines 44 48) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-21 13:26:13,706 INFO L268 CegarLoopResult]: For program point L36-2(lines 36 39) no Hoare annotation was computed. [2020-08-21 13:26:13,707 INFO L264 CegarLoopResult]: At program point L36-3(lines 36 39) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-21 13:26:13,707 INFO L268 CegarLoopResult]: For program point L36-4(lines 36 39) no Hoare annotation was computed. [2020-08-21 13:26:13,707 INFO L268 CegarLoopResult]: For program point L28-2(lines 28 32) no Hoare annotation was computed. [2020-08-21 13:26:13,707 INFO L264 CegarLoopResult]: At program point L28-3(lines 28 32) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-21 13:26:13,707 INFO L268 CegarLoopResult]: For program point L28-4(lines 28 32) no Hoare annotation was computed. [2020-08-21 13:26:13,707 INFO L268 CegarLoopResult]: For program point L45-2(lines 45 47) no Hoare annotation was computed. [2020-08-21 13:26:13,707 INFO L264 CegarLoopResult]: At program point L45-3(lines 45 47) the Hoare annotation is: false [2020-08-21 13:26:13,707 INFO L268 CegarLoopResult]: For program point L29-2(lines 29 31) no Hoare annotation was computed. [2020-08-21 13:26:13,708 INFO L264 CegarLoopResult]: At program point L29-3(lines 29 31) the Hoare annotation is: false [2020-08-21 13:26:13,708 INFO L264 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: false [2020-08-21 13:26:13,708 INFO L268 CegarLoopResult]: For program point L46-1(line 46) no Hoare annotation was computed. [2020-08-21 13:26:13,708 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 16 56) no Hoare annotation was computed. [2020-08-21 13:26:13,708 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: false [2020-08-21 13:26:13,708 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 16 56) the Hoare annotation is: (and (= |#memory_int| |old(#memory_int)|) (= |old(#valid)| |#valid|)) [2020-08-21 13:26:13,708 INFO L268 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed. [2020-08-21 13:26:13,709 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 25) no Hoare annotation was computed. [2020-08-21 13:26:13,709 INFO L264 CegarLoopResult]: At program point L22-3(lines 22 25) the Hoare annotation is: (= main_~n~0 0) [2020-08-21 13:26:13,709 INFO L268 CegarLoopResult]: For program point L22-4(lines 22 25) no Hoare annotation was computed. [2020-08-21 13:26:13,709 INFO L268 CegarLoopResult]: For program point L40-2(lines 40 49) no Hoare annotation was computed. [2020-08-21 13:26:13,709 INFO L264 CegarLoopResult]: At program point L40-3(lines 40 49) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-21 13:26:13,709 INFO L268 CegarLoopResult]: For program point L40-4(lines 40 49) no Hoare annotation was computed. [2020-08-21 13:26:13,709 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-21 13:26:13,709 INFO L268 CegarLoopResult]: For program point L41-1(line 41) no Hoare annotation was computed. [2020-08-21 13:26:13,710 INFO L268 CegarLoopResult]: For program point L41-2(lines 41 43) no Hoare annotation was computed. [2020-08-21 13:26:13,710 INFO L268 CegarLoopResult]: For program point L41-4(lines 41 43) no Hoare annotation was computed. [2020-08-21 13:26:13,710 INFO L268 CegarLoopResult]: For program point L50-2(lines 50 54) no Hoare annotation was computed. [2020-08-21 13:26:13,710 INFO L264 CegarLoopResult]: At program point L50-3(lines 50 54) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-21 13:26:13,710 INFO L268 CegarLoopResult]: For program point L50-4(lines 50 54) no Hoare annotation was computed. [2020-08-21 13:26:13,710 INFO L264 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: false [2020-08-21 13:26:13,710 INFO L268 CegarLoopResult]: For program point L42-1(line 42) no Hoare annotation was computed. [2020-08-21 13:26:13,710 INFO L268 CegarLoopResult]: For program point L51-2(lines 51 53) no Hoare annotation was computed. [2020-08-21 13:26:13,710 INFO L264 CegarLoopResult]: At program point L51-3(lines 51 53) the Hoare annotation is: false [2020-08-21 13:26:13,710 INFO L268 CegarLoopResult]: For program point L2-1(line 2) no Hoare annotation was computed. [2020-08-21 13:26:13,710 INFO L268 CegarLoopResult]: For program point L2-3(line 2) no Hoare annotation was computed. [2020-08-21 13:26:13,711 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(line 2) the Hoare annotation is: true [2020-08-21 13:26:13,711 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(line 2) no Hoare annotation was computed. [2020-08-21 13:26:13,711 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 2) no Hoare annotation was computed. [2020-08-21 13:26:13,711 INFO L268 CegarLoopResult]: For program point L2(line 2) no Hoare annotation was computed. [2020-08-21 13:26:13,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 01:26:13 BoogieIcfgContainer [2020-08-21 13:26:13,730 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 13:26:13,732 INFO L168 Benchmark]: Toolchain (without parser) took 40008.24 ms. Allocated memory was 142.1 MB in the beginning and 467.1 MB in the end (delta: 325.1 MB). Free memory was 105.2 MB in the beginning and 296.8 MB in the end (delta: -191.6 MB). Peak memory consumption was 133.4 MB. Max. memory is 7.1 GB. [2020-08-21 13:26:13,733 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 142.1 MB. Free memory was 123.6 MB in the beginning and 123.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 13:26:13,733 INFO L168 Benchmark]: CACSL2BoogieTranslator took 401.22 ms. Allocated memory was 142.1 MB in the beginning and 204.5 MB in the end (delta: 62.4 MB). Free memory was 105.0 MB in the beginning and 182.7 MB in the end (delta: -77.7 MB). Peak memory consumption was 23.3 MB. Max. memory is 7.1 GB. [2020-08-21 13:26:13,734 INFO L168 Benchmark]: Boogie Preprocessor took 42.92 ms. Allocated memory is still 204.5 MB. Free memory was 182.7 MB in the beginning and 180.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. [2020-08-21 13:26:13,734 INFO L168 Benchmark]: RCFGBuilder took 457.16 ms. Allocated memory is still 204.5 MB. Free memory was 180.1 MB in the beginning and 157.0 MB in the end (delta: 23.2 MB). Peak memory consumption was 23.2 MB. Max. memory is 7.1 GB. [2020-08-21 13:26:13,735 INFO L168 Benchmark]: TraceAbstraction took 39100.99 ms. Allocated memory was 204.5 MB in the beginning and 467.1 MB in the end (delta: 262.7 MB). Free memory was 156.3 MB in the beginning and 296.8 MB in the end (delta: -140.5 MB). Peak memory consumption was 122.1 MB. Max. memory is 7.1 GB. [2020-08-21 13:26:13,737 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 142.1 MB. Free memory was 123.6 MB in the beginning and 123.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 401.22 ms. Allocated memory was 142.1 MB in the beginning and 204.5 MB in the end (delta: 62.4 MB). Free memory was 105.0 MB in the beginning and 182.7 MB in the end (delta: -77.7 MB). Peak memory consumption was 23.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 42.92 ms. Allocated memory is still 204.5 MB. Free memory was 182.7 MB in the beginning and 180.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 457.16 ms. Allocated memory is still 204.5 MB. Free memory was 180.1 MB in the beginning and 157.0 MB in the end (delta: 23.2 MB). Peak memory consumption was 23.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 39100.99 ms. Allocated memory was 204.5 MB in the beginning and 467.1 MB in the end (delta: 262.7 MB). Free memory was 156.3 MB in the beginning and 296.8 MB in the end (delta: -140.5 MB). Peak memory consumption was 122.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 2]: 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: 36]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: n == 0 - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: 0 <= i && size == \old(size) - InvariantResult [Line: 50]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 45]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 51]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 38.7s, OverallIterations: 33, TraceHistogramMax: 28, AutomataDifference: 29.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3341 SDtfs, 10177 SDslu, 14445 SDs, 0 SdLazy, 26514 SolverSat, 5300 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 20.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 743 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 533 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 6.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=137occurred in iteration=32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 33 MinimizatonAttempts, 8700 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 22 LocationsWithAnnotation, 250 PreInvPairs, 290 NumberOfFragments, 81 HoareAnnotationTreeSize, 250 FomulaSimplifications, 452 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 22 FomulaSimplificationsInter, 33 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 7.4s InterpolantComputationTime, 1992 NumberOfCodeBlocks, 1992 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 1959 ConstructedInterpolants, 0 QuantifiedInterpolants, 278362 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 33 InterpolantComputations, 5 PerfectInterpolantSequences, 3160/10091 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...