/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 17:20:45,133 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 17:20:45,136 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 17:20:45,176 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 17:20:45,176 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 17:20:45,185 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 17:20:45,187 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 17:20:45,190 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 17:20:45,193 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 17:20:45,196 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 17:20:45,196 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 17:20:45,197 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 17:20:45,197 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 17:20:45,200 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 17:20:45,202 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 17:20:45,204 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 17:20:45,205 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 17:20:45,206 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 17:20:45,207 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 17:20:45,215 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 17:20:45,217 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 17:20:45,218 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 17:20:45,219 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 17:20:45,219 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 17:20:45,236 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 17:20:45,248 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 17:20:45,249 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 17:20:45,251 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 17:20:45,252 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 17:20:45,295 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 17:20:45,295 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 17:20:45,296 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 17:20:45,297 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 17:20:45,297 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 17:20:45,297 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 17:20:45,297 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 17:20:45,298 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 17:20:45,298 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 17:20:45,299 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 17:20:45,300 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 17:20:45,300 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 17:20:45,300 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 17:20:45,301 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 17:20:45,301 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 17:20:45,301 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 17:20:45,301 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 17:20:45,302 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 17:20:45,302 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 17:20:45,302 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 17:20:45,302 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 17:20:45,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 17:20:45,303 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 17:20:45,303 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 17:20:45,303 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 17:20:45,304 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 17:20:45,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 17:20:45,304 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 17:20:45,304 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 17:20:45,304 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; [2020-08-21 17:20:45,639 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 17:20:45,658 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 17:20:45,661 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 17:20:45,663 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 17:20:45,663 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 17:20:45,664 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_10.c [2020-08-21 17:20:45,731 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9695a0c6d/ec22560c3db3417297994f2d00a2733c/FLAGb799f72b6 [2020-08-21 17:20:46,169 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 17:20:46,170 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_10.c [2020-08-21 17:20:46,182 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9695a0c6d/ec22560c3db3417297994f2d00a2733c/FLAGb799f72b6 [2020-08-21 17:20:46,605 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9695a0c6d/ec22560c3db3417297994f2d00a2733c [2020-08-21 17:20:46,616 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 17:20:46,618 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 17:20:46,620 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 17:20:46,620 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 17:20:46,624 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 17:20:46,625 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:20:46" (1/1) ... [2020-08-21 17:20:46,628 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ecced43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:46, skipping insertion in model container [2020-08-21 17:20:46,628 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:20:46" (1/1) ... [2020-08-21 17:20:46,636 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 17:20:46,671 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 17:20:46,900 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:20:46,904 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 17:20:46,940 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:20:46,956 INFO L208 MainTranslator]: Completed translation [2020-08-21 17:20:46,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:46 WrapperNode [2020-08-21 17:20:46,957 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 17:20:46,958 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 17:20:46,958 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 17:20:46,958 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 17:20:47,069 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:46" (1/1) ... [2020-08-21 17:20:47,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:46" (1/1) ... [2020-08-21 17:20:47,076 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:46" (1/1) ... [2020-08-21 17:20:47,076 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:46" (1/1) ... [2020-08-21 17:20:47,082 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:46" (1/1) ... [2020-08-21 17:20:47,090 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:46" (1/1) ... [2020-08-21 17:20:47,091 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:46" (1/1) ... [2020-08-21 17:20:47,094 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 17:20:47,094 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 17:20:47,094 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 17:20:47,095 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 17:20:47,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:46" (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 17:20:47,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 17:20:47,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 17:20:47,165 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 17:20:47,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 17:20:47,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 17:20:47,165 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 17:20:47,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 17:20:47,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 17:20:47,516 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 17:20:47,516 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 17:20:47,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:20:47 BoogieIcfgContainer [2020-08-21 17:20:47,521 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 17:20:47,522 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 17:20:47,523 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 17:20:47,526 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 17:20:47,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 05:20:46" (1/3) ... [2020-08-21 17:20:47,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed5497a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:20:47, skipping insertion in model container [2020-08-21 17:20:47,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:20:46" (2/3) ... [2020-08-21 17:20:47,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed5497a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:20:47, skipping insertion in model container [2020-08-21 17:20:47,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:20:47" (3/3) ... [2020-08-21 17:20:47,530 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_10.c [2020-08-21 17:20:47,540 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 17:20:47,548 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 17:20:47,561 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 17:20:47,586 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 17:20:47,587 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 17:20:47,587 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 17:20:47,587 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 17:20:47,588 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 17:20:47,588 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 17:20:47,588 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 17:20:47,588 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 17:20:47,609 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-08-21 17:20:47,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 17:20:47,615 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:47,616 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:47,616 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:47,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:47,621 INFO L82 PathProgramCache]: Analyzing trace with hash -917347053, now seen corresponding path program 1 times [2020-08-21 17:20:47,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:47,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868297735] [2020-08-21 17:20:47,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:47,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:47,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:47,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:47,822 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 17:20:47,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868297735] [2020-08-21 17:20:47,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:47,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:47,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002922636] [2020-08-21 17:20:47,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:47,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:47,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:47,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:47,850 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-08-21 17:20:47,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:47,906 INFO L93 Difference]: Finished difference Result 87 states and 150 transitions. [2020-08-21 17:20:47,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:47,908 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 17:20:47,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:47,920 INFO L225 Difference]: With dead ends: 87 [2020-08-21 17:20:47,920 INFO L226 Difference]: Without dead ends: 72 [2020-08-21 17:20:47,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:47,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-21 17:20:47,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-08-21 17:20:47,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-21 17:20:47,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 89 transitions. [2020-08-21 17:20:47,966 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 89 transitions. Word has length 20 [2020-08-21 17:20:47,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:47,967 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 89 transitions. [2020-08-21 17:20:47,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:47,967 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 89 transitions. [2020-08-21 17:20:47,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 17:20:47,969 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:47,969 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:47,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 17:20:47,970 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:47,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:47,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1504153067, now seen corresponding path program 1 times [2020-08-21 17:20:47,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:47,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420996336] [2020-08-21 17:20:47,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:47,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:48,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:48,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:48,039 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 17:20:48,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420996336] [2020-08-21 17:20:48,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:48,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:48,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635762005] [2020-08-21 17:20:48,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:48,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:48,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:48,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:48,044 INFO L87 Difference]: Start difference. First operand 50 states and 89 transitions. Second operand 3 states. [2020-08-21 17:20:48,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:48,074 INFO L93 Difference]: Finished difference Result 117 states and 212 transitions. [2020-08-21 17:20:48,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:48,075 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 17:20:48,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:48,077 INFO L225 Difference]: With dead ends: 117 [2020-08-21 17:20:48,077 INFO L226 Difference]: Without dead ends: 72 [2020-08-21 17:20:48,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:48,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-21 17:20:48,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-08-21 17:20:48,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-21 17:20:48,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 125 transitions. [2020-08-21 17:20:48,097 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 125 transitions. Word has length 20 [2020-08-21 17:20:48,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:48,097 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 125 transitions. [2020-08-21 17:20:48,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:48,098 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 125 transitions. [2020-08-21 17:20:48,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 17:20:48,099 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:48,099 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:48,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 17:20:48,100 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:48,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:48,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1627225809, now seen corresponding path program 1 times [2020-08-21 17:20:48,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:48,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068867522] [2020-08-21 17:20:48,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:48,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:48,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:48,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:48,168 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 17:20:48,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068867522] [2020-08-21 17:20:48,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:48,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:48,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575458961] [2020-08-21 17:20:48,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:48,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:48,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:48,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:48,172 INFO L87 Difference]: Start difference. First operand 70 states and 125 transitions. Second operand 3 states. [2020-08-21 17:20:48,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:48,201 INFO L93 Difference]: Finished difference Result 108 states and 189 transitions. [2020-08-21 17:20:48,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:48,201 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 17:20:48,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:48,203 INFO L225 Difference]: With dead ends: 108 [2020-08-21 17:20:48,203 INFO L226 Difference]: Without dead ends: 75 [2020-08-21 17:20:48,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:48,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-21 17:20:48,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-08-21 17:20:48,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-21 17:20:48,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 127 transitions. [2020-08-21 17:20:48,216 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 127 transitions. Word has length 21 [2020-08-21 17:20:48,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:48,216 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 127 transitions. [2020-08-21 17:20:48,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:48,217 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 127 transitions. [2020-08-21 17:20:48,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 17:20:48,218 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:48,218 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:48,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 17:20:48,218 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:48,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:48,219 INFO L82 PathProgramCache]: Analyzing trace with hash 616108559, now seen corresponding path program 1 times [2020-08-21 17:20:48,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:48,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970754848] [2020-08-21 17:20:48,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:48,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:48,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:48,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:48,277 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 17:20:48,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970754848] [2020-08-21 17:20:48,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:48,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:48,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455822187] [2020-08-21 17:20:48,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:48,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:48,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:48,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:48,282 INFO L87 Difference]: Start difference. First operand 73 states and 127 transitions. Second operand 3 states. [2020-08-21 17:20:48,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:48,328 INFO L93 Difference]: Finished difference Result 136 states and 240 transitions. [2020-08-21 17:20:48,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:48,329 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 17:20:48,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:48,331 INFO L225 Difference]: With dead ends: 136 [2020-08-21 17:20:48,331 INFO L226 Difference]: Without dead ends: 134 [2020-08-21 17:20:48,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:48,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-08-21 17:20:48,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 96. [2020-08-21 17:20:48,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-21 17:20:48,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 168 transitions. [2020-08-21 17:20:48,347 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 168 transitions. Word has length 21 [2020-08-21 17:20:48,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:48,347 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 168 transitions. [2020-08-21 17:20:48,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:48,347 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 168 transitions. [2020-08-21 17:20:48,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 17:20:48,349 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:48,349 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:48,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 17:20:48,349 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:48,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:48,350 INFO L82 PathProgramCache]: Analyzing trace with hash 29302545, now seen corresponding path program 1 times [2020-08-21 17:20:48,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:48,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465946133] [2020-08-21 17:20:48,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:48,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:48,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:48,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:48,399 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 17:20:48,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465946133] [2020-08-21 17:20:48,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:48,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:48,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352743635] [2020-08-21 17:20:48,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:48,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:48,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:48,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:48,403 INFO L87 Difference]: Start difference. First operand 96 states and 168 transitions. Second operand 3 states. [2020-08-21 17:20:48,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:48,449 INFO L93 Difference]: Finished difference Result 224 states and 398 transitions. [2020-08-21 17:20:48,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:48,452 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 17:20:48,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:48,454 INFO L225 Difference]: With dead ends: 224 [2020-08-21 17:20:48,454 INFO L226 Difference]: Without dead ends: 136 [2020-08-21 17:20:48,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:48,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-21 17:20:48,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-08-21 17:20:48,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-08-21 17:20:48,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 234 transitions. [2020-08-21 17:20:48,473 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 234 transitions. Word has length 21 [2020-08-21 17:20:48,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:48,473 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 234 transitions. [2020-08-21 17:20:48,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:48,474 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 234 transitions. [2020-08-21 17:20:48,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 17:20:48,475 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:48,475 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:48,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 17:20:48,476 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:48,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:48,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1919709866, now seen corresponding path program 1 times [2020-08-21 17:20:48,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:48,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207317937] [2020-08-21 17:20:48,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:48,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:48,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:48,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:48,515 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 17:20:48,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207317937] [2020-08-21 17:20:48,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:48,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:48,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028217048] [2020-08-21 17:20:48,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:48,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:48,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:48,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:48,518 INFO L87 Difference]: Start difference. First operand 134 states and 234 transitions. Second operand 3 states. [2020-08-21 17:20:48,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:48,538 INFO L93 Difference]: Finished difference Result 201 states and 349 transitions. [2020-08-21 17:20:48,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:48,538 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 17:20:48,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:48,540 INFO L225 Difference]: With dead ends: 201 [2020-08-21 17:20:48,540 INFO L226 Difference]: Without dead ends: 138 [2020-08-21 17:20:48,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:48,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-21 17:20:48,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-08-21 17:20:48,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-21 17:20:48,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 234 transitions. [2020-08-21 17:20:48,570 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 234 transitions. Word has length 22 [2020-08-21 17:20:48,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:48,570 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 234 transitions. [2020-08-21 17:20:48,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:48,571 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 234 transitions. [2020-08-21 17:20:48,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 17:20:48,572 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:48,572 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:48,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 17:20:48,573 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:48,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:48,573 INFO L82 PathProgramCache]: Analyzing trace with hash 908592616, now seen corresponding path program 1 times [2020-08-21 17:20:48,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:48,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650013063] [2020-08-21 17:20:48,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:48,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:48,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:48,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:48,607 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 17:20:48,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650013063] [2020-08-21 17:20:48,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:48,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:48,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976601374] [2020-08-21 17:20:48,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:48,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:48,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:48,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:48,610 INFO L87 Difference]: Start difference. First operand 136 states and 234 transitions. Second operand 3 states. [2020-08-21 17:20:48,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:48,628 INFO L93 Difference]: Finished difference Result 252 states and 440 transitions. [2020-08-21 17:20:48,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:48,629 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 17:20:48,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:48,631 INFO L225 Difference]: With dead ends: 252 [2020-08-21 17:20:48,631 INFO L226 Difference]: Without dead ends: 250 [2020-08-21 17:20:48,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:48,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-21 17:20:48,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 184. [2020-08-21 17:20:48,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-08-21 17:20:48,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 314 transitions. [2020-08-21 17:20:48,646 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 314 transitions. Word has length 22 [2020-08-21 17:20:48,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:48,646 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 314 transitions. [2020-08-21 17:20:48,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:48,647 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 314 transitions. [2020-08-21 17:20:48,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 17:20:48,648 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:48,649 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:48,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 17:20:48,649 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:48,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:48,650 INFO L82 PathProgramCache]: Analyzing trace with hash 321786602, now seen corresponding path program 1 times [2020-08-21 17:20:48,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:48,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228125878] [2020-08-21 17:20:48,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:48,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:48,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:48,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:48,679 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 17:20:48,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228125878] [2020-08-21 17:20:48,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:48,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:48,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979188712] [2020-08-21 17:20:48,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:48,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:48,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:48,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:48,682 INFO L87 Difference]: Start difference. First operand 184 states and 314 transitions. Second operand 3 states. [2020-08-21 17:20:48,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:48,705 INFO L93 Difference]: Finished difference Result 432 states and 744 transitions. [2020-08-21 17:20:48,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:48,705 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 17:20:48,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:48,707 INFO L225 Difference]: With dead ends: 432 [2020-08-21 17:20:48,708 INFO L226 Difference]: Without dead ends: 258 [2020-08-21 17:20:48,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:48,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-08-21 17:20:48,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-08-21 17:20:48,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-21 17:20:48,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 434 transitions. [2020-08-21 17:20:48,726 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 434 transitions. Word has length 22 [2020-08-21 17:20:48,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:48,727 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 434 transitions. [2020-08-21 17:20:48,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:48,727 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 434 transitions. [2020-08-21 17:20:48,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 17:20:48,729 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:48,729 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:48,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 17:20:48,730 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:48,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:48,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1898185914, now seen corresponding path program 1 times [2020-08-21 17:20:48,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:48,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073894594] [2020-08-21 17:20:48,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:48,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:48,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:48,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:48,779 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 17:20:48,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073894594] [2020-08-21 17:20:48,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:48,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:48,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303298678] [2020-08-21 17:20:48,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:48,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:48,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:48,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:48,784 INFO L87 Difference]: Start difference. First operand 256 states and 434 transitions. Second operand 3 states. [2020-08-21 17:20:48,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:48,819 INFO L93 Difference]: Finished difference Result 384 states and 648 transitions. [2020-08-21 17:20:48,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:48,819 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 17:20:48,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:48,821 INFO L225 Difference]: With dead ends: 384 [2020-08-21 17:20:48,822 INFO L226 Difference]: Without dead ends: 262 [2020-08-21 17:20:48,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:48,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-08-21 17:20:48,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2020-08-21 17:20:48,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-08-21 17:20:48,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 434 transitions. [2020-08-21 17:20:48,837 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 434 transitions. Word has length 23 [2020-08-21 17:20:48,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:48,837 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 434 transitions. [2020-08-21 17:20:48,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:48,837 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 434 transitions. [2020-08-21 17:20:48,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 17:20:48,839 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:48,839 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:48,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 17:20:48,840 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:48,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:48,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1385664132, now seen corresponding path program 1 times [2020-08-21 17:20:48,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:48,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087754413] [2020-08-21 17:20:48,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:48,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:48,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:48,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:48,869 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 17:20:48,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087754413] [2020-08-21 17:20:48,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:48,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:48,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23471712] [2020-08-21 17:20:48,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:48,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:48,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:48,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:48,872 INFO L87 Difference]: Start difference. First operand 260 states and 434 transitions. Second operand 3 states. [2020-08-21 17:20:48,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:48,894 INFO L93 Difference]: Finished difference Result 476 states and 808 transitions. [2020-08-21 17:20:48,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:48,895 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 17:20:48,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:48,898 INFO L225 Difference]: With dead ends: 476 [2020-08-21 17:20:48,898 INFO L226 Difference]: Without dead ends: 474 [2020-08-21 17:20:48,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:48,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-08-21 17:20:48,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 360. [2020-08-21 17:20:48,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-08-21 17:20:48,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 590 transitions. [2020-08-21 17:20:48,914 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 590 transitions. Word has length 23 [2020-08-21 17:20:48,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:48,915 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 590 transitions. [2020-08-21 17:20:48,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:48,915 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 590 transitions. [2020-08-21 17:20:48,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 17:20:48,917 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:48,918 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:48,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 17:20:48,918 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:48,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:48,919 INFO L82 PathProgramCache]: Analyzing trace with hash 798858118, now seen corresponding path program 1 times [2020-08-21 17:20:48,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:48,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751135217] [2020-08-21 17:20:48,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:48,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:48,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:48,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:48,962 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 17:20:48,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751135217] [2020-08-21 17:20:48,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:48,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:48,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217555944] [2020-08-21 17:20:48,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:48,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:48,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:48,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:48,964 INFO L87 Difference]: Start difference. First operand 360 states and 590 transitions. Second operand 3 states. [2020-08-21 17:20:48,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:48,994 INFO L93 Difference]: Finished difference Result 844 states and 1392 transitions. [2020-08-21 17:20:48,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:48,995 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 17:20:48,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:48,998 INFO L225 Difference]: With dead ends: 844 [2020-08-21 17:20:48,999 INFO L226 Difference]: Without dead ends: 498 [2020-08-21 17:20:49,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:49,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-08-21 17:20:49,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 496. [2020-08-21 17:20:49,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2020-08-21 17:20:49,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 806 transitions. [2020-08-21 17:20:49,020 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 806 transitions. Word has length 23 [2020-08-21 17:20:49,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:49,020 INFO L479 AbstractCegarLoop]: Abstraction has 496 states and 806 transitions. [2020-08-21 17:20:49,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:49,021 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 806 transitions. [2020-08-21 17:20:49,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 17:20:49,022 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:49,023 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:49,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 17:20:49,023 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:49,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:49,023 INFO L82 PathProgramCache]: Analyzing trace with hash 6129535, now seen corresponding path program 1 times [2020-08-21 17:20:49,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:49,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079121424] [2020-08-21 17:20:49,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:49,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:49,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:49,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:49,049 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 17:20:49,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079121424] [2020-08-21 17:20:49,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:49,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:49,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795709726] [2020-08-21 17:20:49,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:49,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:49,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:49,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:49,052 INFO L87 Difference]: Start difference. First operand 496 states and 806 transitions. Second operand 3 states. [2020-08-21 17:20:49,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:49,077 INFO L93 Difference]: Finished difference Result 744 states and 1204 transitions. [2020-08-21 17:20:49,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:49,078 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 17:20:49,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:49,080 INFO L225 Difference]: With dead ends: 744 [2020-08-21 17:20:49,081 INFO L226 Difference]: Without dead ends: 506 [2020-08-21 17:20:49,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:49,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-08-21 17:20:49,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 504. [2020-08-21 17:20:49,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-08-21 17:20:49,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 806 transitions. [2020-08-21 17:20:49,099 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 806 transitions. Word has length 24 [2020-08-21 17:20:49,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:49,100 INFO L479 AbstractCegarLoop]: Abstraction has 504 states and 806 transitions. [2020-08-21 17:20:49,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:49,100 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 806 transitions. [2020-08-21 17:20:49,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 17:20:49,101 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:49,102 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:49,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 17:20:49,102 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:49,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:49,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1004987715, now seen corresponding path program 1 times [2020-08-21 17:20:49,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:49,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973138473] [2020-08-21 17:20:49,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:49,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:49,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:49,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:49,127 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 17:20:49,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973138473] [2020-08-21 17:20:49,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:49,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:49,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353305861] [2020-08-21 17:20:49,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:49,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:49,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:49,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:49,130 INFO L87 Difference]: Start difference. First operand 504 states and 806 transitions. Second operand 3 states. [2020-08-21 17:20:49,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:49,153 INFO L93 Difference]: Finished difference Result 908 states and 1480 transitions. [2020-08-21 17:20:49,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:49,154 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 17:20:49,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:49,159 INFO L225 Difference]: With dead ends: 908 [2020-08-21 17:20:49,159 INFO L226 Difference]: Without dead ends: 906 [2020-08-21 17:20:49,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:49,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2020-08-21 17:20:49,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 712. [2020-08-21 17:20:49,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-08-21 17:20:49,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1110 transitions. [2020-08-21 17:20:49,185 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1110 transitions. Word has length 24 [2020-08-21 17:20:49,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:49,186 INFO L479 AbstractCegarLoop]: Abstraction has 712 states and 1110 transitions. [2020-08-21 17:20:49,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:49,186 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1110 transitions. [2020-08-21 17:20:49,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 17:20:49,188 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:49,188 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:49,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 17:20:49,189 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:49,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:49,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1591793729, now seen corresponding path program 1 times [2020-08-21 17:20:49,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:49,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851204039] [2020-08-21 17:20:49,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:49,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:49,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:49,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:49,219 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 17:20:49,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851204039] [2020-08-21 17:20:49,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:49,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:49,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287736008] [2020-08-21 17:20:49,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:49,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:49,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:49,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:49,222 INFO L87 Difference]: Start difference. First operand 712 states and 1110 transitions. Second operand 3 states. [2020-08-21 17:20:49,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:49,257 INFO L93 Difference]: Finished difference Result 1660 states and 2600 transitions. [2020-08-21 17:20:49,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:49,257 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 17:20:49,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:49,263 INFO L225 Difference]: With dead ends: 1660 [2020-08-21 17:20:49,263 INFO L226 Difference]: Without dead ends: 970 [2020-08-21 17:20:49,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:49,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-08-21 17:20:49,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 968. [2020-08-21 17:20:49,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 968 states. [2020-08-21 17:20:49,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1494 transitions. [2020-08-21 17:20:49,300 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1494 transitions. Word has length 24 [2020-08-21 17:20:49,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:49,301 INFO L479 AbstractCegarLoop]: Abstraction has 968 states and 1494 transitions. [2020-08-21 17:20:49,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:49,301 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1494 transitions. [2020-08-21 17:20:49,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 17:20:49,303 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:49,303 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:49,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 17:20:49,304 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:49,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:49,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1089633349, now seen corresponding path program 1 times [2020-08-21 17:20:49,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:49,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549568339] [2020-08-21 17:20:49,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:49,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:49,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:49,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:49,333 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 17:20:49,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1549568339] [2020-08-21 17:20:49,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:49,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:49,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742381442] [2020-08-21 17:20:49,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:49,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:49,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:49,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:49,336 INFO L87 Difference]: Start difference. First operand 968 states and 1494 transitions. Second operand 3 states. [2020-08-21 17:20:49,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:49,375 INFO L93 Difference]: Finished difference Result 1452 states and 2232 transitions. [2020-08-21 17:20:49,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:49,376 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 17:20:49,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:49,381 INFO L225 Difference]: With dead ends: 1452 [2020-08-21 17:20:49,381 INFO L226 Difference]: Without dead ends: 986 [2020-08-21 17:20:49,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:49,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2020-08-21 17:20:49,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 984. [2020-08-21 17:20:49,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 984 states. [2020-08-21 17:20:49,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1494 transitions. [2020-08-21 17:20:49,412 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1494 transitions. Word has length 25 [2020-08-21 17:20:49,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:49,412 INFO L479 AbstractCegarLoop]: Abstraction has 984 states and 1494 transitions. [2020-08-21 17:20:49,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:49,413 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1494 transitions. [2020-08-21 17:20:49,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 17:20:49,414 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:49,414 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:49,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 17:20:49,415 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:49,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:49,415 INFO L82 PathProgramCache]: Analyzing trace with hash -2100750599, now seen corresponding path program 1 times [2020-08-21 17:20:49,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:49,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164821434] [2020-08-21 17:20:49,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:49,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:49,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:49,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:49,438 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 17:20:49,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164821434] [2020-08-21 17:20:49,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:49,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:49,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129870762] [2020-08-21 17:20:49,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:49,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:49,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:49,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:49,440 INFO L87 Difference]: Start difference. First operand 984 states and 1494 transitions. Second operand 3 states. [2020-08-21 17:20:49,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:49,473 INFO L93 Difference]: Finished difference Result 1740 states and 2696 transitions. [2020-08-21 17:20:49,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:49,474 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 17:20:49,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:49,482 INFO L225 Difference]: With dead ends: 1740 [2020-08-21 17:20:49,483 INFO L226 Difference]: Without dead ends: 1738 [2020-08-21 17:20:49,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:49,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-08-21 17:20:49,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1416. [2020-08-21 17:20:49,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1416 states. [2020-08-21 17:20:49,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2086 transitions. [2020-08-21 17:20:49,525 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2086 transitions. Word has length 25 [2020-08-21 17:20:49,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:49,526 INFO L479 AbstractCegarLoop]: Abstraction has 1416 states and 2086 transitions. [2020-08-21 17:20:49,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:49,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2086 transitions. [2020-08-21 17:20:49,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 17:20:49,528 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:49,528 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:49,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 17:20:49,529 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:49,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:49,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1607410683, now seen corresponding path program 1 times [2020-08-21 17:20:49,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:49,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988049274] [2020-08-21 17:20:49,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:49,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:49,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:49,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:49,550 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 17:20:49,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988049274] [2020-08-21 17:20:49,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:49,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:49,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401682858] [2020-08-21 17:20:49,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:49,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:49,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:49,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:49,552 INFO L87 Difference]: Start difference. First operand 1416 states and 2086 transitions. Second operand 3 states. [2020-08-21 17:20:49,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:49,596 INFO L93 Difference]: Finished difference Result 3276 states and 4840 transitions. [2020-08-21 17:20:49,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:49,597 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 17:20:49,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:49,606 INFO L225 Difference]: With dead ends: 3276 [2020-08-21 17:20:49,606 INFO L226 Difference]: Without dead ends: 1898 [2020-08-21 17:20:49,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:49,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2020-08-21 17:20:49,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1896. [2020-08-21 17:20:49,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1896 states. [2020-08-21 17:20:49,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2758 transitions. [2020-08-21 17:20:49,668 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2758 transitions. Word has length 25 [2020-08-21 17:20:49,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:49,668 INFO L479 AbstractCegarLoop]: Abstraction has 1896 states and 2758 transitions. [2020-08-21 17:20:49,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:49,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2758 transitions. [2020-08-21 17:20:49,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 17:20:49,671 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:49,671 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:49,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 17:20:49,672 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:49,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:49,672 INFO L82 PathProgramCache]: Analyzing trace with hash -698544044, now seen corresponding path program 1 times [2020-08-21 17:20:49,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:49,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099079102] [2020-08-21 17:20:49,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:49,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:49,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:49,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:49,698 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 17:20:49,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099079102] [2020-08-21 17:20:49,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:49,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:49,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224691056] [2020-08-21 17:20:49,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:49,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:49,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:49,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:49,700 INFO L87 Difference]: Start difference. First operand 1896 states and 2758 transitions. Second operand 3 states. [2020-08-21 17:20:49,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:49,748 INFO L93 Difference]: Finished difference Result 2844 states and 4120 transitions. [2020-08-21 17:20:49,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:49,748 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 17:20:49,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:49,761 INFO L225 Difference]: With dead ends: 2844 [2020-08-21 17:20:49,762 INFO L226 Difference]: Without dead ends: 1930 [2020-08-21 17:20:49,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:49,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-21 17:20:49,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1928. [2020-08-21 17:20:49,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1928 states. [2020-08-21 17:20:49,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 2758 transitions. [2020-08-21 17:20:49,846 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 2758 transitions. Word has length 26 [2020-08-21 17:20:49,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:49,847 INFO L479 AbstractCegarLoop]: Abstraction has 1928 states and 2758 transitions. [2020-08-21 17:20:49,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:49,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 2758 transitions. [2020-08-21 17:20:49,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 17:20:49,851 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:49,851 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:49,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 17:20:49,852 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:49,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:49,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1709661294, now seen corresponding path program 1 times [2020-08-21 17:20:49,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:49,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644183162] [2020-08-21 17:20:49,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:49,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:49,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:49,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:49,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:20:49,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644183162] [2020-08-21 17:20:49,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:49,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:49,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618002987] [2020-08-21 17:20:49,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:49,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:49,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:49,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:49,893 INFO L87 Difference]: Start difference. First operand 1928 states and 2758 transitions. Second operand 3 states. [2020-08-21 17:20:49,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:49,989 INFO L93 Difference]: Finished difference Result 3340 states and 4872 transitions. [2020-08-21 17:20:49,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:49,990 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 17:20:49,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:50,006 INFO L225 Difference]: With dead ends: 3340 [2020-08-21 17:20:50,006 INFO L226 Difference]: Without dead ends: 3338 [2020-08-21 17:20:50,008 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:50,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-08-21 17:20:50,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 2824. [2020-08-21 17:20:50,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2824 states. [2020-08-21 17:20:50,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 3910 transitions. [2020-08-21 17:20:50,130 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 3910 transitions. Word has length 26 [2020-08-21 17:20:50,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:50,130 INFO L479 AbstractCegarLoop]: Abstraction has 2824 states and 3910 transitions. [2020-08-21 17:20:50,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:50,131 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 3910 transitions. [2020-08-21 17:20:50,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 17:20:50,141 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:50,141 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:50,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 17:20:50,142 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:50,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:50,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1998499988, now seen corresponding path program 1 times [2020-08-21 17:20:50,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:50,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268731185] [2020-08-21 17:20:50,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:50,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:50,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:50,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:50,172 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 17:20:50,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268731185] [2020-08-21 17:20:50,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:50,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:50,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729506496] [2020-08-21 17:20:50,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:50,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:50,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:50,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:50,174 INFO L87 Difference]: Start difference. First operand 2824 states and 3910 transitions. Second operand 3 states. [2020-08-21 17:20:50,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:50,258 INFO L93 Difference]: Finished difference Result 6476 states and 8968 transitions. [2020-08-21 17:20:50,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:50,258 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 17:20:50,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:50,274 INFO L225 Difference]: With dead ends: 6476 [2020-08-21 17:20:50,274 INFO L226 Difference]: Without dead ends: 3722 [2020-08-21 17:20:50,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:50,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-21 17:20:50,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3720. [2020-08-21 17:20:50,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3720 states. [2020-08-21 17:20:50,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 5062 transitions. [2020-08-21 17:20:50,386 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 5062 transitions. Word has length 26 [2020-08-21 17:20:50,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:50,386 INFO L479 AbstractCegarLoop]: Abstraction has 3720 states and 5062 transitions. [2020-08-21 17:20:50,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:50,387 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 5062 transitions. [2020-08-21 17:20:50,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 17:20:50,392 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:50,392 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:50,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 17:20:50,394 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:50,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:50,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1459677136, now seen corresponding path program 1 times [2020-08-21 17:20:50,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:50,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750797025] [2020-08-21 17:20:50,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:50,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:50,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:50,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:50,427 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 17:20:50,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750797025] [2020-08-21 17:20:50,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:50,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:50,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26271984] [2020-08-21 17:20:50,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:50,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:50,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:50,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:50,429 INFO L87 Difference]: Start difference. First operand 3720 states and 5062 transitions. Second operand 3 states. [2020-08-21 17:20:50,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:50,520 INFO L93 Difference]: Finished difference Result 5580 states and 7560 transitions. [2020-08-21 17:20:50,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:50,521 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 17:20:50,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:50,538 INFO L225 Difference]: With dead ends: 5580 [2020-08-21 17:20:50,539 INFO L226 Difference]: Without dead ends: 3786 [2020-08-21 17:20:50,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:50,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3786 states. [2020-08-21 17:20:50,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 3784. [2020-08-21 17:20:50,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3784 states. [2020-08-21 17:20:50,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 5062 transitions. [2020-08-21 17:20:50,647 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 5062 transitions. Word has length 27 [2020-08-21 17:20:50,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:50,647 INFO L479 AbstractCegarLoop]: Abstraction has 3784 states and 5062 transitions. [2020-08-21 17:20:50,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:50,648 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 5062 transitions. [2020-08-21 17:20:50,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 17:20:50,653 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:50,653 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:50,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 17:20:50,653 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:50,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:50,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1824172910, now seen corresponding path program 1 times [2020-08-21 17:20:50,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:50,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169398639] [2020-08-21 17:20:50,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:50,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:50,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:50,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:50,683 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 17:20:50,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169398639] [2020-08-21 17:20:50,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:50,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:50,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757106046] [2020-08-21 17:20:50,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:50,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:50,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:50,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:50,686 INFO L87 Difference]: Start difference. First operand 3784 states and 5062 transitions. Second operand 3 states. [2020-08-21 17:20:50,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:50,791 INFO L93 Difference]: Finished difference Result 10956 states and 14408 transitions. [2020-08-21 17:20:50,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:50,791 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 17:20:50,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:50,825 INFO L225 Difference]: With dead ends: 10956 [2020-08-21 17:20:50,825 INFO L226 Difference]: Without dead ends: 7306 [2020-08-21 17:20:50,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:50,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7306 states. [2020-08-21 17:20:51,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7306 to 7304. [2020-08-21 17:20:51,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-08-21 17:20:51,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9350 transitions. [2020-08-21 17:20:51,035 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9350 transitions. Word has length 27 [2020-08-21 17:20:51,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:51,036 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9350 transitions. [2020-08-21 17:20:51,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:51,113 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9350 transitions. [2020-08-21 17:20:51,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 17:20:51,122 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:51,122 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:51,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 17:20:51,123 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:51,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:51,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1883988372, now seen corresponding path program 1 times [2020-08-21 17:20:51,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:51,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078673919] [2020-08-21 17:20:51,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:51,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:51,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:51,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:51,144 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 17:20:51,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078673919] [2020-08-21 17:20:51,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:51,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:51,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496510691] [2020-08-21 17:20:51,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:51,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:51,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:51,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:51,146 INFO L87 Difference]: Start difference. First operand 7304 states and 9350 transitions. Second operand 3 states. [2020-08-21 17:20:51,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:51,276 INFO L93 Difference]: Finished difference Result 8076 states and 10632 transitions. [2020-08-21 17:20:51,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:51,277 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 17:20:51,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:51,295 INFO L225 Difference]: With dead ends: 8076 [2020-08-21 17:20:51,295 INFO L226 Difference]: Without dead ends: 8074 [2020-08-21 17:20:51,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:51,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-21 17:20:51,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 7304. [2020-08-21 17:20:51,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-08-21 17:20:51,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9222 transitions. [2020-08-21 17:20:51,478 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9222 transitions. Word has length 27 [2020-08-21 17:20:51,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:51,478 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9222 transitions. [2020-08-21 17:20:51,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:51,478 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9222 transitions. [2020-08-21 17:20:51,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 17:20:51,487 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:51,487 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:51,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 17:20:51,487 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:51,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:51,488 INFO L82 PathProgramCache]: Analyzing trace with hash 715001129, now seen corresponding path program 1 times [2020-08-21 17:20:51,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:51,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296981373] [2020-08-21 17:20:51,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:51,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:51,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:51,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:51,517 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 17:20:51,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296981373] [2020-08-21 17:20:51,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:51,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:51,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604217936] [2020-08-21 17:20:51,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:51,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:51,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:51,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:51,519 INFO L87 Difference]: Start difference. First operand 7304 states and 9222 transitions. Second operand 3 states. [2020-08-21 17:20:51,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:51,708 INFO L93 Difference]: Finished difference Result 12172 states and 15496 transitions. [2020-08-21 17:20:51,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:51,708 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-21 17:20:51,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:51,730 INFO L225 Difference]: With dead ends: 12172 [2020-08-21 17:20:51,731 INFO L226 Difference]: Without dead ends: 12170 [2020-08-21 17:20:51,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:51,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12170 states. [2020-08-21 17:20:51,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12170 to 11144. [2020-08-21 17:20:51,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11144 states. [2020-08-21 17:20:51,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11144 states to 11144 states and 13702 transitions. [2020-08-21 17:20:51,957 INFO L78 Accepts]: Start accepts. Automaton has 11144 states and 13702 transitions. Word has length 28 [2020-08-21 17:20:51,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:51,958 INFO L479 AbstractCegarLoop]: Abstraction has 11144 states and 13702 transitions. [2020-08-21 17:20:51,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:51,958 INFO L276 IsEmpty]: Start isEmpty. Operand 11144 states and 13702 transitions. [2020-08-21 17:20:51,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 17:20:51,974 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:51,974 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:51,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 17:20:51,975 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:51,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:51,975 INFO L82 PathProgramCache]: Analyzing trace with hash 128195115, now seen corresponding path program 1 times [2020-08-21 17:20:51,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:51,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055467144] [2020-08-21 17:20:51,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:51,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:52,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:52,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:52,025 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 17:20:52,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055467144] [2020-08-21 17:20:52,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:52,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:52,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660662573] [2020-08-21 17:20:52,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:52,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:52,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:52,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:52,027 INFO L87 Difference]: Start difference. First operand 11144 states and 13702 transitions. Second operand 3 states. [2020-08-21 17:20:52,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:52,335 INFO L93 Difference]: Finished difference Result 25228 states and 30856 transitions. [2020-08-21 17:20:52,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:52,336 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-21 17:20:52,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:52,371 INFO L225 Difference]: With dead ends: 25228 [2020-08-21 17:20:52,371 INFO L226 Difference]: Without dead ends: 14218 [2020-08-21 17:20:52,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:52,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14218 states. [2020-08-21 17:20:52,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14218 to 14216. [2020-08-21 17:20:52,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14216 states. [2020-08-21 17:20:52,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14216 states to 14216 states and 16902 transitions. [2020-08-21 17:20:52,702 INFO L78 Accepts]: Start accepts. Automaton has 14216 states and 16902 transitions. Word has length 28 [2020-08-21 17:20:52,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:52,703 INFO L479 AbstractCegarLoop]: Abstraction has 14216 states and 16902 transitions. [2020-08-21 17:20:52,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:52,703 INFO L276 IsEmpty]: Start isEmpty. Operand 14216 states and 16902 transitions. [2020-08-21 17:20:52,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-21 17:20:52,719 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:52,719 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:52,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-21 17:20:52,720 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:52,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:52,720 INFO L82 PathProgramCache]: Analyzing trace with hash 690414627, now seen corresponding path program 1 times [2020-08-21 17:20:52,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:52,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423648942] [2020-08-21 17:20:52,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:52,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:52,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:52,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:52,748 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 17:20:52,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423648942] [2020-08-21 17:20:52,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:52,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:52,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623578838] [2020-08-21 17:20:52,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:52,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:52,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:52,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:52,750 INFO L87 Difference]: Start difference. First operand 14216 states and 16902 transitions. Second operand 3 states. [2020-08-21 17:20:52,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:52,999 INFO L93 Difference]: Finished difference Result 21516 states and 25608 transitions. [2020-08-21 17:20:53,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:53,000 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-21 17:20:53,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:53,024 INFO L225 Difference]: With dead ends: 21516 [2020-08-21 17:20:53,025 INFO L226 Difference]: Without dead ends: 14602 [2020-08-21 17:20:53,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:53,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14602 states. [2020-08-21 17:20:53,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14602 to 14600. [2020-08-21 17:20:53,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14600 states. [2020-08-21 17:20:53,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14600 states to 14600 states and 17158 transitions. [2020-08-21 17:20:53,322 INFO L78 Accepts]: Start accepts. Automaton has 14600 states and 17158 transitions. Word has length 29 [2020-08-21 17:20:53,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:53,322 INFO L479 AbstractCegarLoop]: Abstraction has 14600 states and 17158 transitions. [2020-08-21 17:20:53,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:53,322 INFO L276 IsEmpty]: Start isEmpty. Operand 14600 states and 17158 transitions. [2020-08-21 17:20:53,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-21 17:20:53,339 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:53,340 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:53,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-21 17:20:53,340 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:53,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:53,341 INFO L82 PathProgramCache]: Analyzing trace with hash -320702623, now seen corresponding path program 1 times [2020-08-21 17:20:53,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:53,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143952430] [2020-08-21 17:20:53,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:53,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:53,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:53,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:53,364 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 17:20:53,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143952430] [2020-08-21 17:20:53,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:53,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:53,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005167123] [2020-08-21 17:20:53,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:53,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:53,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:53,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:53,366 INFO L87 Difference]: Start difference. First operand 14600 states and 17158 transitions. Second operand 3 states. [2020-08-21 17:20:53,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:53,768 INFO L93 Difference]: Finished difference Result 23562 states and 27399 transitions. [2020-08-21 17:20:53,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:53,769 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-21 17:20:53,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:53,817 INFO L225 Difference]: With dead ends: 23562 [2020-08-21 17:20:53,818 INFO L226 Difference]: Without dead ends: 23560 [2020-08-21 17:20:53,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:53,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23560 states. [2020-08-21 17:20:54,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23560 to 22536. [2020-08-21 17:20:54,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22536 states. [2020-08-21 17:20:54,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22536 states to 22536 states and 25862 transitions. [2020-08-21 17:20:54,180 INFO L78 Accepts]: Start accepts. Automaton has 22536 states and 25862 transitions. Word has length 29 [2020-08-21 17:20:54,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:54,180 INFO L479 AbstractCegarLoop]: Abstraction has 22536 states and 25862 transitions. [2020-08-21 17:20:54,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:54,181 INFO L276 IsEmpty]: Start isEmpty. Operand 22536 states and 25862 transitions. [2020-08-21 17:20:54,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-21 17:20:54,213 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:20:54,213 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:20:54,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-21 17:20:54,214 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:20:54,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:20:54,214 INFO L82 PathProgramCache]: Analyzing trace with hash -907508637, now seen corresponding path program 1 times [2020-08-21 17:20:54,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:20:54,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690207837] [2020-08-21 17:20:54,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:20:54,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:54,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:20:54,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:20:54,235 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 17:20:54,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690207837] [2020-08-21 17:20:54,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:20:54,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 17:20:54,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598027967] [2020-08-21 17:20:54,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 17:20:54,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:20:54,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 17:20:54,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:54,239 INFO L87 Difference]: Start difference. First operand 22536 states and 25862 transitions. Second operand 3 states. [2020-08-21 17:20:55,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:20:55,034 INFO L93 Difference]: Finished difference Result 50184 states and 56582 transitions. [2020-08-21 17:20:55,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 17:20:55,035 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-21 17:20:55,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:20:55,035 INFO L225 Difference]: With dead ends: 50184 [2020-08-21 17:20:55,035 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 17:20:55,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 17:20:55,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 17:20:55,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 17:20:55,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 17:20:55,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 17:20:55,098 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-08-21 17:20:55,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:20:55,098 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 17:20:55,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 17:20:55,098 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 17:20:55,098 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 17:20:55,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-21 17:20:55,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 17:20:55,127 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 17:20:55,128 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 17:20:55,128 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 17:20:55,128 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 17:20:55,128 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 17:20:55,128 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 17:20:55,128 INFO L271 CegarLoopResult]: At program point L159(lines 5 163) the Hoare annotation is: true [2020-08-21 17:20:55,128 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 163) no Hoare annotation was computed. [2020-08-21 17:20:55,128 INFO L268 CegarLoopResult]: For program point L118-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 17:20:55,129 INFO L268 CegarLoopResult]: For program point L143-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 17:20:55,129 INFO L268 CegarLoopResult]: For program point L102-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 17:20:55,129 INFO L268 CegarLoopResult]: For program point L94-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 17:20:55,129 INFO L268 CegarLoopResult]: For program point L119(line 119) no Hoare annotation was computed. [2020-08-21 17:20:55,129 INFO L268 CegarLoopResult]: For program point L86-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 17:20:55,129 INFO L268 CegarLoopResult]: For program point L144(line 144) no Hoare annotation was computed. [2020-08-21 17:20:55,129 INFO L268 CegarLoopResult]: For program point L78-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 17:20:55,129 INFO L268 CegarLoopResult]: For program point L70-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 17:20:55,130 INFO L268 CegarLoopResult]: For program point L128-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 17:20:55,130 INFO L271 CegarLoopResult]: At program point L153-1(lines 39 158) the Hoare annotation is: true [2020-08-21 17:20:55,130 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 163) no Hoare annotation was computed. [2020-08-21 17:20:55,130 INFO L268 CegarLoopResult]: For program point L129(line 129) no Hoare annotation was computed. [2020-08-21 17:20:55,130 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 161) no Hoare annotation was computed. [2020-08-21 17:20:55,130 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 163) the Hoare annotation is: true [2020-08-21 17:20:55,130 INFO L268 CegarLoopResult]: For program point L154(line 154) no Hoare annotation was computed. [2020-08-21 17:20:55,131 INFO L264 CegarLoopResult]: At program point L154-1(lines 5 163) the Hoare annotation is: false [2020-08-21 17:20:55,131 INFO L268 CegarLoopResult]: For program point L113-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 17:20:55,131 INFO L268 CegarLoopResult]: For program point L138-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 17:20:55,131 INFO L268 CegarLoopResult]: For program point L114(line 114) no Hoare annotation was computed. [2020-08-21 17:20:55,131 INFO L268 CegarLoopResult]: For program point L139(line 139) no Hoare annotation was computed. [2020-08-21 17:20:55,131 INFO L268 CegarLoopResult]: For program point L98-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 17:20:55,131 INFO L268 CegarLoopResult]: For program point L123-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 17:20:55,131 INFO L268 CegarLoopResult]: For program point L90-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 17:20:55,131 INFO L268 CegarLoopResult]: For program point L148-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 17:20:55,132 INFO L268 CegarLoopResult]: For program point L82-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 17:20:55,132 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-08-21 17:20:55,132 INFO L268 CegarLoopResult]: For program point L74-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 17:20:55,132 INFO L268 CegarLoopResult]: For program point L66(lines 66 68) no Hoare annotation was computed. [2020-08-21 17:20:55,132 INFO L268 CegarLoopResult]: For program point L66-2(lines 39 158) no Hoare annotation was computed. [2020-08-21 17:20:55,132 INFO L268 CegarLoopResult]: For program point L124(line 124) no Hoare annotation was computed. [2020-08-21 17:20:55,132 INFO L268 CegarLoopResult]: For program point L149(line 149) no Hoare annotation was computed. [2020-08-21 17:20:55,132 INFO L268 CegarLoopResult]: For program point L108-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 17:20:55,132 INFO L268 CegarLoopResult]: For program point L133-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 17:20:55,133 INFO L268 CegarLoopResult]: For program point L109(line 109) no Hoare annotation was computed. [2020-08-21 17:20:55,133 INFO L268 CegarLoopResult]: For program point L134(line 134) no Hoare annotation was computed. [2020-08-21 17:20:55,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 05:20:55 BoogieIcfgContainer [2020-08-21 17:20:55,145 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 17:20:55,148 INFO L168 Benchmark]: Toolchain (without parser) took 8528.99 ms. Allocated memory was 147.8 MB in the beginning and 614.5 MB in the end (delta: 466.6 MB). Free memory was 102.3 MB in the beginning and 411.1 MB in the end (delta: -308.8 MB). Peak memory consumption was 157.8 MB. Max. memory is 7.1 GB. [2020-08-21 17:20:55,148 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 147.8 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 209.7 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 17:20:55,149 INFO L168 Benchmark]: CACSL2BoogieTranslator took 337.87 ms. Allocated memory is still 147.8 MB. Free memory was 102.1 MB in the beginning and 91.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-08-21 17:20:55,149 INFO L168 Benchmark]: Boogie Preprocessor took 136.06 ms. Allocated memory was 147.8 MB in the beginning and 202.4 MB in the end (delta: 54.5 MB). Free memory was 91.4 MB in the beginning and 179.4 MB in the end (delta: -88.0 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-21 17:20:55,150 INFO L168 Benchmark]: RCFGBuilder took 426.98 ms. Allocated memory is still 202.4 MB. Free memory was 179.4 MB in the beginning and 160.6 MB in the end (delta: 18.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 7.1 GB. [2020-08-21 17:20:55,151 INFO L168 Benchmark]: TraceAbstraction took 7622.83 ms. Allocated memory was 202.4 MB in the beginning and 614.5 MB in the end (delta: 412.1 MB). Free memory was 160.0 MB in the beginning and 411.1 MB in the end (delta: -251.2 MB). Peak memory consumption was 160.9 MB. Max. memory is 7.1 GB. [2020-08-21 17:20:55,153 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 147.8 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 209.7 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 337.87 ms. Allocated memory is still 147.8 MB. Free memory was 102.1 MB in the beginning and 91.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 136.06 ms. Allocated memory was 147.8 MB in the beginning and 202.4 MB in the end (delta: 54.5 MB). Free memory was 91.4 MB in the beginning and 179.4 MB in the end (delta: -88.0 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 426.98 ms. Allocated memory is still 202.4 MB. Free memory was 179.4 MB in the beginning and 160.6 MB in the end (delta: 18.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7622.83 ms. Allocated memory was 202.4 MB in the beginning and 614.5 MB in the end (delta: 412.1 MB). Free memory was 160.0 MB in the beginning and 411.1 MB in the end (delta: -251.2 MB). Peak memory consumption was 160.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 161]: 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: 39]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 44 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.5s, OverallIterations: 28, TraceHistogramMax: 1, AutomataDifference: 3.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2384 SDtfs, 1153 SDslu, 1624 SDs, 0 SdLazy, 149 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 140 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22536occurred in iteration=27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.3s AutomataMinimizationTime, 28 MinimizatonAttempts, 4124 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 1034 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 687 NumberOfCodeBlocks, 687 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 659 ConstructedInterpolants, 0 QuantifiedInterpolants, 31265 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 28 InterpolantComputations, 28 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...